91029057 has 32 divisors (see below), whose sum is σ = 151065600. Its totient is φ = 47573568.

The previous prime is 91029049. The next prime is 91029097. The reversal of 91029057 is 75092019.

It is not a de Polignac number, because 91029057 - 2³ = 91029049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91029047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7638 + ... + 15504.

It is an arithmetic number, because the mean of its divisors is an integer number (4720800).

Almost surely, 2^91029057 is an apocalyptic number.

It is an amenable number.

91029057 is a deficient number, since it is larger than the sum of its proper divisors (60036543).

91029057 is a wasteful number, since it uses less digits than its factorization.

91029057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7925.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 91029057 is about 9540.9148932374. The cubic root of 91029057 is about 449.8420136763.

The spelling of 91029057 in words is "ninety-one million, twenty-nine thousand, fifty-seven".