91873793 has 8 divisors (see below), whose sum is σ = 100586016. Its totient is φ = 83221600.

The previous prime is 91873783. The next prime is 91873807. The reversal of 91873793 is 39737819.

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

It is not a de Polignac number, because 91873793 - 2⁴ = 91873777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91873783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11771 + ... + 17952.

It is an arithmetic number, because the mean of its divisors is an integer number (12573252).

Almost surely, 2^91873793 is an apocalyptic number.

It is an amenable number.

91873793 is a deficient number, since it is larger than the sum of its proper divisors (8712223).

91873793 is a wasteful number, since it uses less digits than its factorization.

91873793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30015.

The product of its digits is 285768, while the sum is 47.

The square root of 91873793 is about 9585.0817941215. The cubic root of 91873793 is about 451.2292202738.

The spelling of 91873793 in words is "ninety-one million, eight hundred seventy-three thousand, seven hundred ninety-three".