91142079 has 16 divisors (see below), whose sum is σ = 141239040. Its totient is φ = 51197760.

The previous prime is 91142059. The next prime is 91142081. The reversal of 91142079 is 97024119.

It is not a de Polignac number, because 91142079 - 2⁵ = 91142047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91142059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35542 + ... + 38019.

It is an arithmetic number, because the mean of its divisors is an integer number (8827440).

Almost surely, 2^91142079 is an apocalyptic number.

91142079 is a deficient number, since it is larger than the sum of its proper divisors (50096961).

91142079 is a wasteful number, since it uses less digits than its factorization.

91142079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73630.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 91142079 is about 9546.8360727521. The cubic root of 91142079 is about 450.0281118240.

The spelling of 91142079 in words is "ninety-one million, one hundred forty-two thousand, seventy-nine".