90997278867 has 72 divisors (see below), whose sum is σ = 150946347552. Its totient is φ = 52685994240.

The previous prime is 90997278851. The next prime is 90997278871. The reversal of 90997278867 is 76887279909.

It is not a de Polignac number, because 90997278867 - 2⁴ = 90997278851 is a prime.

It is a super-2 number, since 2×90997278867² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90997278795 and 90997278804.

It is not an unprimeable number, because it can be changed into a prime (90997278467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 25871793 + ... + 25875309.

Almost surely, 2^90997278867 is an apocalyptic number.

90997278867 is a deficient number, since it is larger than the sum of its proper divisors (59949068685).

90997278867 is a wasteful number, since it uses less digits than its factorization.

90997278867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4601 (or 4587 counting only the distinct ones).

The product of its (nonzero) digits is 192036096, while the sum is 72.

The spelling of 90997278867 in words is "ninety billion, nine hundred ninety-seven million, two hundred seventy-eight thousand, eight hundred sixty-seven".