91674537 has 4 divisors (see below), whose sum is σ = 122232720. Its totient is φ = 61116356.

The previous prime is 91674511. The next prime is 91674547. The reversal of 91674537 is 73547619.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91674537 - 2⁸ = 91674281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91674547) 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, 15279087 + ... + 15279092.

It is an arithmetic number, because the mean of its divisors is an integer number (30558180).

Almost surely, 2^91674537 is an apocalyptic number.

It is an amenable number.

91674537 is a deficient number, since it is larger than the sum of its proper divisors (30558183).

91674537 is a wasteful number, since it uses less digits than its factorization.

91674537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30558182.

The product of its digits is 158760, while the sum is 42.

The square root of 91674537 is about 9574.6820834950. The cubic root of 91674537 is about 450.9027753248.

The spelling of 91674537 in words is "ninety-one million, six hundred seventy-four thousand, five hundred thirty-seven".