90507523 has 2 divisors, whose sum is σ = 90507524. Its totient is φ = 90507522.

The previous prime is 90507511. The next prime is 90507551. The reversal of 90507523 is 32570509.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90507523 - 2⁵ = 90507491 is a prime.

It is a super-2 number, since 2×90507523² = 16383223439191058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90507223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45253761 + 45253762.

It is an arithmetic number, because the mean of its divisors is an integer number (45253762).

Almost surely, 2^90507523 is an apocalyptic number.

90507523 is a deficient number, since it is larger than the sum of its proper divisors (1).

90507523 is an equidigital number, since it uses as much as digits as its factorization.

90507523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 90507523 is about 9513.5441871050. The cubic root of 90507523 is about 448.9812724599.

The spelling of 90507523 in words is "ninety million, five hundred seven thousand, five hundred twenty-three".