90039679 has 2 divisors, whose sum is σ = 90039680. Its totient is φ = 90039678.

The previous prime is 90039673. The next prime is 90039683. The reversal of 90039679 is 97693009.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90039679 - 2⁵ = 90039647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90039673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45019839 + 45019840.

It is an arithmetic number, because the mean of its divisors is an integer number (45019840).

Almost surely, 2^90039679 is an apocalyptic number.

90039679 is a deficient number, since it is larger than the sum of its proper divisors (1).

90039679 is an equidigital number, since it uses as much as digits as its factorization.

90039679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 90039679 is about 9488.9240169790. The cubic root of 90039679 is about 448.2063233718.

The spelling of 90039679 in words is "ninety million, thirty-nine thousand, six hundred seventy-nine".