90618511 has 2 divisors, whose sum is σ = 90618512. Its totient is φ = 90618510.

The previous prime is 90618497. The next prime is 90618529. The reversal of 90618511 is 11581609.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90618511 - 2²⁵ = 57064079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90618911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45309255 + 45309256.

It is an arithmetic number, because the mean of its divisors is an integer number (45309256).

Almost surely, 2^90618511 is an apocalyptic number.

90618511 is a deficient number, since it is larger than the sum of its proper divisors (1).

90618511 is an equidigital number, since it uses as much as digits as its factorization.

90618511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 90618511 is about 9519.3755572516. The cubic root of 90618511 is about 449.1647237962.

The spelling of 90618511 in words is "ninety million, six hundred eighteen thousand, five hundred eleven".