90436762391 has 2 divisors, whose sum is σ = 90436762392. Its totient is φ = 90436762390.

The previous prime is 90436762327. The next prime is 90436762397. The reversal of 90436762391 is 19326763409.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90436762391 - 2⁶ = 90436762327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90436762397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45218381195 + 45218381196.

It is an arithmetic number, because the mean of its divisors is an integer number (45218381196).

Almost surely, 2^90436762391 is an apocalyptic number.

90436762391 is a deficient number, since it is larger than the sum of its proper divisors (1).

90436762391 is an equidigital number, since it uses as much as digits as its factorization.

90436762391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 50.

The spelling of 90436762391 in words is "ninety billion, four hundred thirty-six million, seven hundred sixty-two thousand, three hundred ninety-one".