91316982969 has 27 divisors (see below), whose sum is σ = 132752354917. Its totient is φ = 60488167416.

The previous prime is 91316982959. The next prime is 91316982973. The reversal of 91316982969 is 96928961319.

The square root of 91316982969 is 302187.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 91316982969 - 2³³ = 82727048377 is a prime.

It is a super-2 number, since 2×91316982969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91316982959) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 238425352 + ... + 238425734.

Almost surely, 2^91316982969 is an apocalyptic number.

91316982969 is the 302187-th square number.

91316982969 is the 151094-th centered octagonal number.

It is an amenable number.

91316982969 is a deficient number, since it is larger than the sum of its proper divisors (41435371948).

91316982969 is an frugal number, since it uses more digits than its factorization.

91316982969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298 (or 649 counting only the distinct ones).

The product of its digits is 11337408, while the sum is 63.

The spelling of 91316982969 in words is "ninety-one billion, three hundred sixteen million, nine hundred eighty-two thousand, nine hundred sixty-nine".