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89200681 = 831074707
BaseRepresentation
bin1010101000100…
…01100000101001
320012211212022221
411110101200221
5140313410211
612503514041
72132123203
oct524214051
9205755287
1089200681
1146395879
1225a58921
131563218b
14bbbd773
157c6ec71
hex5511829

89200681 has 4 divisors (see below), whose sum is σ = 90275472. Its totient is φ = 88125892.

The previous prime is 89200679. The next prime is 89200691. The reversal of 89200681 is 18600298.

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: 18600298 = 29300149.

It is a cyclic number.

It is not a de Polignac number, because 89200681 - 21 = 89200679 is a prime.

It is a super-2 number, since 2×892006812 = 15913522981727522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89200691) 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, 537271 + ... + 537436.

It is an arithmetic number, because the mean of its divisors is an integer number (22568868).

Almost surely, 289200681 is an apocalyptic number.

It is an amenable number.

89200681 is a deficient number, since it is larger than the sum of its proper divisors (1074791).

89200681 is a wasteful number, since it uses less digits than its factorization.

89200681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074790.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 89200681 is about 9444.6112148674. The cubic root of 89200681 is about 446.8098342455.

The spelling of 89200681 in words is "eighty-nine million, two hundred thousand, six hundred eighty-one".

Divisors: 1 83 1074707 89200681