90007657 has 2 divisors, whose sum is σ = 90007658. Its totient is φ = 90007656.

The previous prime is 90007649. The next prime is 90007661. The reversal of 90007657 is 75670009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72233001 + 17774656 = 8499^2 + 4216^2 .

It is a cyclic number.

It is not a de Polignac number, because 90007657 - 2³ = 90007649 is a prime.

It is not a weakly prime, because it can be changed into another prime (90007637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45003828 + 45003829.

It is an arithmetic number, because the mean of its divisors is an integer number (45003829).

Almost surely, 2^90007657 is an apocalyptic number.

It is an amenable number.

90007657 is a deficient number, since it is larger than the sum of its proper divisors (1).

90007657 is an equidigital number, since it uses as much as digits as its factorization.

90007657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 90007657 is about 9487.2365312561. The cubic root of 90007657 is about 448.1531832272.

The spelling of 90007657 in words is "ninety million, seven thousand, six hundred fifty-seven".