90258631 has 2 divisors, whose sum is σ = 90258632. Its totient is φ = 90258630.

The previous prime is 90258583. The next prime is 90258653. The reversal of 90258631 is 13685209.

It is a strong prime.

It is an emirp because it is prime and its reverse (13685209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90258631 - 2²⁵ = 56704199 is a prime.

It is a super-2 number, since 2×90258631² = 16293240939988322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90258131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45129315 + 45129316.

It is an arithmetic number, because the mean of its divisors is an integer number (45129316).

Almost surely, 2^90258631 is an apocalyptic number.

90258631 is a deficient number, since it is larger than the sum of its proper divisors (1).

90258631 is an equidigital number, since it uses as much as digits as its factorization.

90258631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 90258631 is about 9500.4542522976. The cubic root of 90258631 is about 448.5693345571.

The spelling of 90258631 in words is "ninety million, two hundred fifty-eight thousand, six hundred thirty-one".