91129641 has 8 divisors (see below), whose sum is σ = 122581920. Its totient is φ = 60215232.

The previous prime is 91129627. The next prime is 91129667. The reversal of 91129641 is 14692119.

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

It is not a de Polignac number, because 91129641 - 2²² = 86935337 is a prime.

It is a super-2 number, since 2×91129641² = 16609222937577762, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91129541) 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, 134071 + ... + 134748.

It is an arithmetic number, because the mean of its divisors is an integer number (15322740).

Almost surely, 2^91129641 is an apocalyptic number.

It is an amenable number.

91129641 is a deficient number, since it is larger than the sum of its proper divisors (31452279).

91129641 is a wasteful number, since it uses less digits than its factorization.

91129641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268935.

The product of its digits is 3888, while the sum is 33.

The square root of 91129641 is about 9546.1846305212. The cubic root of 91129641 is about 450.0076393765.

The spelling of 91129641 in words is "ninety-one million, one hundred twenty-nine thousand, six hundred forty-one".