91994273 has 16 divisors (see below), whose sum is σ = 111787776. Its totient is φ = 73993920.

The previous prime is 91994269. The next prime is 91994281. The reversal of 91994273 is 37249919.

It is not a de Polignac number, because 91994273 - 2² = 91994269 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91994233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3143 + ... + 13923.

It is an arithmetic number, because the mean of its divisors is an integer number (6986736).

Almost surely, 2^91994273 is an apocalyptic number.

It is an amenable number.

91994273 is a deficient number, since it is larger than the sum of its proper divisors (19793503).

91994273 is a wasteful number, since it uses less digits than its factorization.

91994273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10864.

The product of its digits is 122472, while the sum is 44.

The square root of 91994273 is about 9591.3645014669. The cubic root of 91994273 is about 451.4263760613.

The spelling of 91994273 in words is "ninety-one million, nine hundred ninety-four thousand, two hundred seventy-three".