90738986131 has 2 divisors, whose sum is σ = 90738986132. Its totient is φ = 90738986130.

The previous prime is 90738986113. The next prime is 90738986137. The reversal of 90738986131 is 13168983709.

Together with previous prime (90738986113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90738986131 - 2⁵ = 90738986099 is a prime.

It is a super-2 number, since 2×90738986131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90738986137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45369493065 + 45369493066.

It is an arithmetic number, because the mean of its divisors is an integer number (45369493066).

Almost surely, 2^90738986131 is an apocalyptic number.

90738986131 is a deficient number, since it is larger than the sum of its proper divisors (1).

90738986131 is an equidigital number, since it uses as much as digits as its factorization.

90738986131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 90738986131 in words is "ninety billion, seven hundred thirty-eight million, nine hundred eighty-six thousand, one hundred thirty-one".