91914971 has 16 divisors (see below), whose sum is σ = 99079200. Its totient is φ = 84963840.

The previous prime is 91914959. The next prime is 91914997. The reversal of 91914971 is 17941919.

It is a cyclic number.

It is not a de Polignac number, because 91914971 - 2¹⁰ = 91913947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91914941) 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, 331685 + ... + 331961.

It is an arithmetic number, because the mean of its divisors is an integer number (6192450).

Almost surely, 2^91914971 is an apocalyptic number.

91914971 is a deficient number, since it is larger than the sum of its proper divisors (7164229).

91914971 is a wasteful number, since it uses less digits than its factorization.

91914971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574.

The product of its digits is 20412, while the sum is 41.

The square root of 91914971 is about 9587.2295789764. The cubic root of 91914971 is about 451.2966241218.

The spelling of 91914971 in words is "ninety-one million, nine hundred fourteen thousand, nine hundred seventy-one".