90057637 has 2 divisors, whose sum is σ = 90057638. Its totient is φ = 90057636.

The previous prime is 90057629. The next prime is 90057647. The reversal of 90057637 is 73675009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89984196 + 73441 = 9486^2 + 271^2 .

It is a cyclic number.

It is not a de Polignac number, because 90057637 - 2³ = 90057629 is a prime.

It is a super-2 number, since 2×90057637² = 16220755964047538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90057596 and 90057605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90057647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45028818 + 45028819.

It is an arithmetic number, because the mean of its divisors is an integer number (45028819).

Almost surely, 2^90057637 is an apocalyptic number.

It is an amenable number.

90057637 is a deficient number, since it is larger than the sum of its proper divisors (1).

90057637 is an equidigital number, since it uses as much as digits as its factorization.

90057637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39690, while the sum is 37.

The square root of 90057637 is about 9489.8702309357. The cubic root of 90057637 is about 448.2361189545.

The spelling of 90057637 in words is "ninety million, fifty-seven thousand, six hundred thirty-seven".