90856323539 has 2 divisors, whose sum is σ = 90856323540. Its totient is φ = 90856323538.

The previous prime is 90856323527. The next prime is 90856323541. The reversal of 90856323539 is 93532365809.

It is a strong prime.

It is an emirp because it is prime and its reverse (93532365809) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90856323539 - 2³² = 86561356243 is a prime.

Together with 90856323541, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90856323589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45428161769 + 45428161770.

It is an arithmetic number, because the mean of its divisors is an integer number (45428161770).

Almost surely, 2^90856323539 is an apocalyptic number.

90856323539 is a deficient number, since it is larger than the sum of its proper divisors (1).

90856323539 is an equidigital number, since it uses as much as digits as its factorization.

90856323539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5248800, while the sum is 53.

The spelling of 90856323539 in words is "ninety billion, eight hundred fifty-six million, three hundred twenty-three thousand, five hundred thirty-nine".