75912991 has 16 divisors (see below), whose sum is σ = 95090688. Its totient is φ = 58874400.

The previous prime is 75912979. The next prime is 75912997. The reversal of 75912991 is 19921957.

It is a cyclic number.

It is not a de Polignac number, because 75912991 - 2⁵ = 75912959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75912997) 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, 14961 + ... + 19381.

It is an arithmetic number, because the mean of its divisors is an integer number (5943168).

Almost surely, 2^75912991 is an apocalyptic number.

75912991 is a deficient number, since it is larger than the sum of its proper divisors (19177697).

75912991 is a wasteful number, since it uses less digits than its factorization.

75912991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4662.

The product of its digits is 51030, while the sum is 43.

The square root of 75912991 is about 8712.8061495709. The cubic root of 75912991 is about 423.4206498680.

The spelling of 75912991 in words is "seventy-five million, nine hundred twelve thousand, nine hundred ninety-one".