90397057 has 2 divisors, whose sum is σ = 90397058. Its totient is φ = 90397056.

The previous prime is 90397039. The next prime is 90397067. The reversal of 90397057 is 75079309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86136961 + 4260096 = 9281^2 + 2064^2 .

It is a cyclic number.

It is not a de Polignac number, because 90397057 - 2¹¹ = 90395009 is a prime.

It is a super-2 number, since 2×90397057² = 16343255828522498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90397037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45198528 + 45198529.

It is an arithmetic number, because the mean of its divisors is an integer number (45198529).

Almost surely, 2^90397057 is an apocalyptic number.

It is an amenable number.

90397057 is a deficient number, since it is larger than the sum of its proper divisors (1).

90397057 is an equidigital number, since it uses as much as digits as its factorization.

90397057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59535, while the sum is 40.

The square root of 90397057 is about 9507.7366917684. The cubic root of 90397057 is about 448.7985349542.

The spelling of 90397057 in words is "ninety million, three hundred ninety-seven thousand, fifty-seven".