89644957 has 2 divisors, whose sum is σ = 89644958. Its totient is φ = 89644956.

The previous prime is 89644943. The next prime is 89644993. The reversal of 89644957 is 75944698.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77070841 + 12574116 = 8779^2 + 3546^2 .

It is a cyclic number.

It is not a de Polignac number, because 89644957 - 2¹¹ = 89642909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89644937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44822478 + 44822479.

It is an arithmetic number, because the mean of its divisors is an integer number (44822479).

Almost surely, 2^89644957 is an apocalyptic number.

It is an amenable number.

89644957 is a deficient number, since it is larger than the sum of its proper divisors (1).

89644957 is an equidigital number, since it uses as much as digits as its factorization.

89644957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 52.

The square root of 89644957 is about 9468.1020801426. The cubic root of 89644957 is about 447.5504049421.

It can be divided in two parts, 89644 and 957, that added together give a square (90601 = 301²).

The spelling of 89644957 in words is "eighty-nine million, six hundred forty-four thousand, nine hundred fifty-seven".