91742915 has 8 divisors (see below), whose sum is σ = 120099888. Its totient is φ = 66722080.

The previous prime is 91742909. The next prime is 91742923. The reversal of 91742915 is 51924719.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91742915 - 2¹⁸ = 91480771 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833972 + ... + 834081.

It is an arithmetic number, because the mean of its divisors is an integer number (15012486).

Almost surely, 2^91742915 is an apocalyptic number.

91742915 is a deficient number, since it is larger than the sum of its proper divisors (28356973).

91742915 is a wasteful number, since it uses less digits than its factorization.

91742915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668069.

The product of its digits is 22680, while the sum is 38.

The square root of 91742915 is about 9578.2521892045. The cubic root of 91742915 is about 451.0148535839.

The spelling of 91742915 in words is "ninety-one million, seven hundred forty-two thousand, nine hundred fifteen".