91734791 has 4 divisors (see below), whose sum is σ = 91756584. Its totient is φ = 91713000.

The previous prime is 91734763. The next prime is 91734809. The reversal of 91734791 is 19743719.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19743719 = 53 ⋅372523.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91734791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91734701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2345 + ... + 13746.

It is an arithmetic number, because the mean of its divisors is an integer number (22939146).

Almost surely, 2^91734791 is an apocalyptic number.

91734791 is a deficient number, since it is larger than the sum of its proper divisors (21793).

91734791 is a wasteful number, since it uses less digits than its factorization.

91734791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21792.

The product of its digits is 47628, while the sum is 41.

The square root of 91734791 is about 9577.8280940931. The cubic root of 91734791 is about 451.0015404657.

The spelling of 91734791 in words is "ninety-one million, seven hundred thirty-four thousand, seven hundred ninety-one".