91674981 has 12 divisors (see below), whose sum is σ = 139389120. Its totient is φ = 57899880.

The previous prime is 91674977. The next prime is 91675007. The reversal of 91674981 is 18947619.

It is a happy number.

It is not a de Polignac number, because 91674981 - 2² = 91674977 is a prime.

It is a super-2 number, since 2×91674981² = 16808604282700722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91674281) 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, 267885 + ... + 268226.

It is an arithmetic number, because the mean of its divisors is an integer number (11615760).

Almost surely, 2^91674981 is an apocalyptic number.

It is an amenable number.

91674981 is a deficient number, since it is larger than the sum of its proper divisors (47714139).

91674981 is a wasteful number, since it uses less digits than its factorization.

91674981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536136 (or 536133 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 91674981 is about 9574.7052696154. The cubic root of 91674981 is about 450.9035032641.

The spelling of 91674981 in words is "ninety-one million, six hundred seventy-four thousand, nine hundred eighty-one".