90506659 has 2 divisors, whose sum is σ = 90506660. Its totient is φ = 90506658.

The previous prime is 90506629. The next prime is 90506707. The reversal of 90506659 is 95660509.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90506659 - 2⁵ = 90506627 is a prime.

It is not a weakly prime, because it can be changed into another prime (90506609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45253329 + 45253330.

It is an arithmetic number, because the mean of its divisors is an integer number (45253330).

Almost surely, 2^90506659 is an apocalyptic number.

90506659 is a deficient number, since it is larger than the sum of its proper divisors (1).

90506659 is an equidigital number, since it uses as much as digits as its factorization.

90506659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 90506659 is about 9513.4987780522. The cubic root of 90506659 is about 448.9798437719.

The spelling of 90506659 in words is "ninety million, five hundred six thousand, six hundred fifty-nine".