89912681 has 4 divisors (see below), whose sum is σ = 93821952. Its totient is φ = 86003412.

The previous prime is 89912663. The next prime is 89912687. The reversal of 89912681 is 18621998.

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: 18621998 = 2 ⋅9310999.

It is a cyclic number.

It is not a de Polignac number, because 89912681 - 2²² = 85718377 is a prime.

It is a super-2 number, since 2×89912681² = 16168580409215522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (89912687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1954601 + ... + 1954646.

It is an arithmetic number, because the mean of its divisors is an integer number (23455488).

Almost surely, 2^89912681 is an apocalyptic number.

It is an amenable number.

89912681 is a deficient number, since it is larger than the sum of its proper divisors (3909271).

89912681 is a wasteful number, since it uses less digits than its factorization.

89912681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3909270.

The product of its digits is 62208, while the sum is 44.

The square root of 89912681 is about 9482.2297483240. The cubic root of 89912681 is about 447.9954974702.

The spelling of 89912681 in words is "eighty-nine million, nine hundred twelve thousand, six hundred eighty-one".