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85065469 = 439193771
BaseRepresentation
bin1010001000111…
…11111011111101
312221001202212221
411010133323331
5133234043334
612235125341
72052021166
oct504377375
9187052787
1085065469
1144020a45
12245a3851
1314814bc8
14b42476d
1577048b4
hex511fefd

85065469 has 4 divisors (see below), whose sum is σ = 85259680. Its totient is φ = 84871260.

The previous prime is 85065419. The next prime is 85065473. The reversal of 85065469 is 96456058.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96456058 = 248228029.

It is a cyclic number.

It is not a de Polignac number, because 85065469 - 221 = 82968317 is a prime.

It is a super-2 number, since 2×850654692 = 14472268032379922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85065419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96447 + ... + 97324.

It is an arithmetic number, because the mean of its divisors is an integer number (21314920).

Almost surely, 285065469 is an apocalyptic number.

It is an amenable number.

85065469 is a deficient number, since it is larger than the sum of its proper divisors (194211).

85065469 is a wasteful number, since it uses less digits than its factorization.

85065469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194210.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 85065469 is about 9223.0943289115. The cubic root of 85065469 is about 439.7958229683.

The spelling of 85065469 in words is "eighty-five million, sixty-five thousand, four hundred sixty-nine".

Divisors: 1 439 193771 85065469