76539431 has 4 divisors (see below), whose sum is σ = 76857264. Its totient is φ = 76221600.

The previous prime is 76539413. The next prime is 76539433. The reversal of 76539431 is 13493567.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13493567 = 37 ⋅364691.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76539431 is a prime.

It is a super-2 number, since 2×76539431² = 11716568995607522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76539433) 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, 158555 + ... + 159036.

It is an arithmetic number, because the mean of its divisors is an integer number (19214316).

Almost surely, 2^76539431 is an apocalyptic number.

76539431 is a deficient number, since it is larger than the sum of its proper divisors (317833).

76539431 is a wasteful number, since it uses less digits than its factorization.

76539431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317832.

The product of its digits is 68040, while the sum is 38.

The square root of 76539431 is about 8748.6816721149. The cubic root of 76539431 is about 424.5821609622.

The spelling of 76539431 in words is "seventy-six million, five hundred thirty-nine thousand, four hundred thirty-one".