90408999739 has 2 divisors, whose sum is σ = 90408999740. Its totient is φ = 90408999738.

The previous prime is 90408999719. The next prime is 90408999767. The reversal of 90408999739 is 93799980409.

It is a weak prime.

It is an emirp because it is prime and its reverse (93799980409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90408999739 - 2²⁷ = 90274782011 is a prime.

It is not a weakly prime, because it can be changed into another prime (90408999719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45204499869 + 45204499870.

It is an arithmetic number, because the mean of its divisors is an integer number (45204499870).

Almost surely, 2^90408999739 is an apocalyptic number.

90408999739 is a deficient number, since it is larger than the sum of its proper divisors (1).

90408999739 is an equidigital number, since it uses as much as digits as its factorization.

90408999739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39680928, while the sum is 67.

The spelling of 90408999739 in words is "ninety billion, four hundred eight million, nine hundred ninety-nine thousand, seven hundred thirty-nine".