90623851 has 2 divisors, whose sum is σ = 90623852. Its totient is φ = 90623850.

The previous prime is 90623843. The next prime is 90623861. The reversal of 90623851 is 15832609.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90623851 - 2³ = 90623843 is a prime.

It is not a weakly prime, because it can be changed into another prime (90623831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45311925 + 45311926.

It is an arithmetic number, because the mean of its divisors is an integer number (45311926).

Almost surely, 2^90623851 is an apocalyptic number.

90623851 is a deficient number, since it is larger than the sum of its proper divisors (1).

90623851 is an equidigital number, since it uses as much as digits as its factorization.

90623851 is an odious number, because the sum of its binary digits is odd.

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

The square root of 90623851 is about 9519.6560337021. The cubic root of 90623851 is about 449.1735464694.

The spelling of 90623851 in words is "ninety million, six hundred twenty-three thousand, eight hundred fifty-one".