90633679 has 2 divisors, whose sum is σ = 90633680. Its totient is φ = 90633678.

The previous prime is 90633643. The next prime is 90633689. The reversal of 90633679 is 97633609.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90633679 - 2²³ = 82245071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90633689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45316839 + 45316840.

It is an arithmetic number, because the mean of its divisors is an integer number (45316840).

Almost surely, 2^90633679 is an apocalyptic number.

90633679 is a deficient number, since it is larger than the sum of its proper divisors (1).

90633679 is an equidigital number, since it uses as much as digits as its factorization.

90633679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 43.

The square root of 90633679 is about 9520.1722148289. The cubic root of 90633679 is about 449.1897832474.

The spelling of 90633679 in words is "ninety million, six hundred thirty-three thousand, six hundred seventy-nine".