89656961 has 2 divisors, whose sum is σ = 89656962. Its totient is φ = 89656960.

The previous prime is 89656943. The next prime is 89657017. The reversal of 89656961 is 16965698.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74718736 + 14938225 = 8644^2 + 3865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89656961 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (89656901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44828480 + 44828481.

It is an arithmetic number, because the mean of its divisors is an integer number (44828481).

Almost surely, 2^89656961 is an apocalyptic number.

It is an amenable number.

89656961 is a deficient number, since it is larger than the sum of its proper divisors (1).

89656961 is an equidigital number, since it uses as much as digits as its factorization.

89656961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 50.

The square root of 89656961 is about 9468.7359768873. The cubic root of 89656961 is about 447.5703806160.

The spelling of 89656961 in words is "eighty-nine million, six hundred fifty-six thousand, nine hundred sixty-one".