91914285 has 16 divisors (see below), whose sum is σ = 149259456. Its totient is φ = 48288768.

The previous prime is 91914269. The next prime is 91914289. The reversal of 91914285 is 58241919.

It is not a de Polignac number, because 91914285 - 2⁴ = 91914269 is a prime.

It is a super-2 number, since 2×91914285² = 16896471574122450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91914289) 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, 44724 + ... + 46733.

It is an arithmetic number, because the mean of its divisors is an integer number (9328716).

Almost surely, 2^91914285 is an apocalyptic number.

It is an amenable number.

91914285 is a deficient number, since it is larger than the sum of its proper divisors (57345171).

91914285 is a wasteful number, since it uses less digits than its factorization.

91914285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91532.

The product of its digits is 25920, while the sum is 39.

The square root of 91914285 is about 9587.1938021509. The cubic root of 91914285 is about 451.2955013804.

The spelling of 91914285 in words is "ninety-one million, nine hundred fourteen thousand, two hundred eighty-five".