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85396081 = 92412
BaseRepresentation
bin1010001011100…
…00101001110001
312221200120101211
411011300221301
5133330133311
612250200121
72054566111
oct505605161
9187616354
1085396081
1144227381
1224723041
13148cc534
14b4ad041
15776c821
hex5170a71

85396081 has 3 divisors (see below), whose sum is σ = 85405323. Its totient is φ = 85386840.

The previous prime is 85396063. The next prime is 85396093. The reversal of 85396081 is 18069358.

It is a happy number.

The square root of 85396081 is 9241.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 84474481 + 921600 = 9191^2 + 960^2 .

It is not a de Polignac number, because 85396081 - 27 = 85395953 is a prime.

It is a super-2 number, since 2×853960812 = 14584981300317122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85396001) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4621 + ... + 13861.

It is an arithmetic number, because the mean of its divisors is an integer number (28468441).

Almost surely, 285396081 is an apocalyptic number.

85396081 is the 9241-st square number.

85396081 is the 4621-st centered octagonal number.

It is an amenable number.

85396081 is a deficient number, since it is larger than the sum of its proper divisors (9242).

85396081 is an frugal number, since it uses more digits than its factorization.

85396081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18482 (or 9241 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The cubic root of 85396081 is about 440.3648506170.

The spelling of 85396081 in words is "eighty-five million, three hundred ninety-six thousand, eighty-one".

Divisors: 1 9241 85396081