89917957 has 2 divisors, whose sum is σ = 89917958. Its totient is φ = 89917956.

The previous prime is 89917943. The next prime is 89917973. The reversal of 89917957 is 75971998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86099841 + 3818116 = 9279^2 + 1954^2 .

It is a cyclic number.

It is not a de Polignac number, because 89917957 - 2¹⁵ = 89885189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 89917898 and 89917907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89917907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44958978 + 44958979.

It is an arithmetic number, because the mean of its divisors is an integer number (44958979).

Almost surely, 2^89917957 is an apocalyptic number.

It is an amenable number.

89917957 is a deficient number, since it is larger than the sum of its proper divisors (1).

89917957 is an equidigital number, since it uses as much as digits as its factorization.

89917957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428840, while the sum is 55.

The square root of 89917957 is about 9482.5079488498. The cubic root of 89917957 is about 448.0042599643.

The spelling of 89917957 in words is "eighty-nine million, nine hundred seventeen thousand, nine hundred fifty-seven".