89520257 has 2 divisors, whose sum is σ = 89520258. Its totient is φ = 89520256.

The previous prime is 89520253. The next prime is 89520271. The reversal of 89520257 is 75202598.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86843761 + 2676496 = 9319^2 + 1636^2 .

It is a cyclic number.

It is not a de Polignac number, because 89520257 - 2² = 89520253 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89520257.

It is not a weakly prime, because it can be changed into another prime (89520253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44760128 + 44760129.

It is an arithmetic number, because the mean of its divisors is an integer number (44760129).

Almost surely, 2^89520257 is an apocalyptic number.

It is an amenable number.

89520257 is a deficient number, since it is larger than the sum of its proper divisors (1).

89520257 is an equidigital number, since it uses as much as digits as its factorization.

89520257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 89520257 is about 9461.5145193568. The cubic root of 89520257 is about 447.3427880082.

The spelling of 89520257 in words is "eighty-nine million, five hundred twenty thousand, two hundred fifty-seven".