91081129 has 8 divisors (see below), whose sum is σ = 92363040. Its totient is φ = 89803776.

The previous prime is 91081099. The next prime is 91081147. The reversal of 91081129 is 92118019.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91081129 - 2⁵ = 91081097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91081129.

It is not an unprimeable number, because it can be changed into a prime (91081169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63114 + ... + 64540.

It is an arithmetic number, because the mean of its divisors is an integer number (11545380).

Almost surely, 2^91081129 is an apocalyptic number.

It is an amenable number.

91081129 is a deficient number, since it is larger than the sum of its proper divisors (1281911).

91081129 is a wasteful number, since it uses less digits than its factorization.

91081129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 91081129 is about 9543.6433818537. The cubic root of 91081129 is about 449.9277727699.

The spelling of 91081129 in words is "ninety-one million, eighty-one thousand, one hundred twenty-nine".