91429331 has 16 divisors (see below), whose sum is σ = 107864064. Its totient is φ = 75860064.

The previous prime is 91429319. The next prime is 91429337. The reversal of 91429331 is 13392419.

It is not a de Polignac number, because 91429331 - 2⁶ = 91429267 is a prime.

It is a super-2 number, since 2×91429331² = 16718645134215122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91429337) 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, 56966 + ... + 58548.

It is an arithmetic number, because the mean of its divisors is an integer number (6741504).

Almost surely, 2^91429331 is an apocalyptic number.

91429331 is a deficient number, since it is larger than the sum of its proper divisors (16434733).

91429331 is a wasteful number, since it uses less digits than its factorization.

91429331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850.

The product of its digits is 5832, while the sum is 32.

The square root of 91429331 is about 9561.8685935334. The cubic root of 91429331 is about 450.5003997282.

The spelling of 91429331 in words is "ninety-one million, four hundred twenty-nine thousand, three hundred thirty-one".