89901681 has 4 divisors (see below), whose sum is σ = 119868912. Its totient is φ = 59934452.

The previous prime is 89901677. The next prime is 89901697. The reversal of 89901681 is 18610998.

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.

It is a cyclic number.

It is not a de Polignac number, because 89901681 - 2² = 89901677 is a prime.

It is a super-2 number, since 2×89901681² = 16164624493251522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (89901631) 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, 14983611 + ... + 14983616.

It is an arithmetic number, because the mean of its divisors is an integer number (29967228).

Almost surely, 2^89901681 is an apocalyptic number.

It is an amenable number.

89901681 is a deficient number, since it is larger than the sum of its proper divisors (29967231).

89901681 is a wasteful number, since it uses less digits than its factorization.

89901681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29967230.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 89901681 is about 9481.6496982329. The cubic root of 89901681 is about 447.9772273315.

The spelling of 89901681 in words is "eighty-nine million, nine hundred one thousand, six hundred eighty-one".