91474663 has 4 divisors (see below), whose sum is σ = 104542480. Its totient is φ = 78406848.

The previous prime is 91474639. The next prime is 91474681. The reversal of 91474663 is 36647419.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91474663 - 2²⁵ = 57920231 is a prime.

It is a super-2 number, since 2×91474663² = 16735227941927138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91474633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6533898 + ... + 6533911.

It is an arithmetic number, because the mean of its divisors is an integer number (26135620).

Almost surely, 2^91474663 is an apocalyptic number.

91474663 is a deficient number, since it is larger than the sum of its proper divisors (13067817).

91474663 is a wasteful number, since it uses less digits than its factorization.

91474663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13067816.

The product of its digits is 108864, while the sum is 40.

The square root of 91474663 is about 9564.2387569529. The cubic root of 91474663 is about 450.5748423227.

The spelling of 91474663 in words is "ninety-one million, four hundred seventy-four thousand, six hundred sixty-three".