90057893 has 2 divisors, whose sum is σ = 90057894. Its totient is φ = 90057892.

The previous prime is 90057841. The next prime is 90057901. The reversal of 90057893 is 39875009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46471489 + 43586404 = 6817^2 + 6602^2 .

It is a cyclic number.

It is not a de Polignac number, because 90057893 - 2⁸ = 90057637 is a prime.

It is a super-2 number, since 2×90057893² = 16220848183198898, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 90057893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90057193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45028946 + 45028947.

It is an arithmetic number, because the mean of its divisors is an integer number (45028947).

Almost surely, 2^90057893 is an apocalyptic number.

It is an amenable number.

90057893 is a deficient number, since it is larger than the sum of its proper divisors (1).

90057893 is an equidigital number, since it uses as much as digits as its factorization.

90057893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 90057893 is about 9489.8837189926. The cubic root of 90057893 is about 448.2365436763.

The spelling of 90057893 in words is "ninety million, fifty-seven thousand, eight hundred ninety-three".