89618961 has 32 divisors (see below), whose sum is σ = 127445760. Its totient is φ = 55931904.

The previous prime is 89618957. The next prime is 89618981. The reversal of 89618961 is 16981698.

It is not a de Polignac number, because 89618961 - 2² = 89618957 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 89618961.

It is not an unprimeable number, because it can be changed into a prime (89618911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 654085 + ... + 654221.

It is an arithmetic number, because the mean of its divisors is an integer number (3982680).

Almost surely, 2^89618961 is an apocalyptic number.

It is an amenable number.

89618961 is a deficient number, since it is larger than the sum of its proper divisors (37826799).

89618961 is a wasteful number, since it uses less digits than its factorization.

89618961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345.

The product of its digits is 186624, while the sum is 48.

The square root of 89618961 is about 9466.7291605918. The cubic root of 89618961 is about 447.5071392804.

The spelling of 89618961 in words is "eighty-nine million, six hundred eighteen thousand, nine hundred sixty-one".