91944291 has 8 divisors (see below), whose sum is σ = 122659920. Its totient is φ = 61262432.

The previous prime is 91944283. The next prime is 91944319. The reversal of 91944291 is 19244919.

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

It is a cyclic number.

It is not a de Polignac number, because 91944291 - 2³ = 91944283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91944091) 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 7 ways as a sum of consecutive naturals, for example, 1200 + ... + 13613.

It is an arithmetic number, because the mean of its divisors is an integer number (15332490).

Almost surely, 2^91944291 is an apocalyptic number.

91944291 is a deficient number, since it is larger than the sum of its proper divisors (30715629).

91944291 is a wasteful number, since it uses less digits than its factorization.

91944291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16885.

The product of its digits is 23328, while the sum is 39.

The square root of 91944291 is about 9588.7585744975. The cubic root of 91944291 is about 451.3446054614.

It can be divided in two parts, 91944 and 291, that added together give a triangular number (92235 = T₄₂₉).

The spelling of 91944291 in words is "ninety-one million, nine hundred forty-four thousand, two hundred ninety-one".