91797669 has 12 divisors (see below), whose sum is σ = 138362016. Its totient is φ = 58537512.

The previous prime is 91797661. The next prime is 91797677. The reversal of 91797669 is 96679719.

It is an interprime number because it is at equal distance from previous prime (91797661) and next prime (91797677).

It is not a de Polignac number, because 91797669 - 2³ = 91797661 is a prime.

It is a super-2 number, since 2×91797669² = 16853624067667122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91797661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221527 + ... + 221940.

It is an arithmetic number, because the mean of its divisors is an integer number (11530168).

Almost surely, 2^91797669 is an apocalyptic number.

It is an amenable number.

91797669 is a deficient number, since it is larger than the sum of its proper divisors (46564347).

91797669 is a wasteful number, since it uses less digits than its factorization.

91797669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443496 (or 443493 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 91797669 is about 9581.1100087620. The cubic root of 91797669 is about 451.1045606243.

The spelling of 91797669 in words is "ninety-one million, seven hundred ninety-seven thousand, six hundred sixty-nine".