91140129 has 12 divisors (see below), whose sum is σ = 131888016. Its totient is φ = 60648792.

The previous prime is 91140121. The next prime is 91140143. The reversal of 91140129 is 92104119.

It is not a de Polignac number, because 91140129 - 2³ = 91140121 is a prime.

It is a super-2 number, since 2×91140129² = 16613046228273282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91140121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3927 + ... + 14060.

It is an arithmetic number, because the mean of its divisors is an integer number (10990668).

Almost surely, 2^91140129 is an apocalyptic number.

It is an amenable number.

91140129 is a deficient number, since it is larger than the sum of its proper divisors (40747887).

91140129 is a wasteful number, since it uses less digits than its factorization.

91140129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18556 (or 18553 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 91140129 is about 9546.7339441298. The cubic root of 91140129 is about 450.0249023256.

The spelling of 91140129 in words is "ninety-one million, one hundred forty thousand, one hundred twenty-nine".