91799129 has 4 divisors (see below), whose sum is σ = 92018640. Its totient is φ = 91579620.

The previous prime is 91799117. The next prime is 91799143. The reversal of 91799129 is 92199719.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92199719 = 331 ⋅278549.

It is a cyclic number.

It is not a de Polignac number, because 91799129 - 2⁸ = 91798873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91799159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109127 + ... + 109964.

It is an arithmetic number, because the mean of its divisors is an integer number (23004660).

Almost surely, 2^91799129 is an apocalyptic number.

It is an amenable number.

91799129 is a deficient number, since it is larger than the sum of its proper divisors (219511).

91799129 is a wasteful number, since it uses less digits than its factorization.

91799129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219510.

The product of its digits is 91854, while the sum is 47.

The square root of 91799129 is about 9581.1862000485. The cubic root of 91799129 is about 451.1069521489.

The spelling of 91799129 in words is "ninety-one million, seven hundred ninety-nine thousand, one hundred twenty-nine".