90863131 has 2 divisors, whose sum is σ = 90863132. Its totient is φ = 90863130.

The previous prime is 90863107. The next prime is 90863153. The reversal of 90863131 is 13136809.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90863131 - 2⁹ = 90862619 is a prime.

It is a super-2 number, since 2×90863131² = 16512217150246322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90863093 and 90863102.

It is not a weakly prime, because it can be changed into another prime (90863161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45431565 + 45431566.

It is an arithmetic number, because the mean of its divisors is an integer number (45431566).

Almost surely, 2^90863131 is an apocalyptic number.

90863131 is a deficient number, since it is larger than the sum of its proper divisors (1).

90863131 is an equidigital number, since it uses as much as digits as its factorization.

90863131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 90863131 is about 9532.2154297939. The cubic root of 90863131 is about 449.5685263399.

The spelling of 90863131 in words is "ninety million, eight hundred sixty-three thousand, one hundred thirty-one".