76947931 has 4 divisors (see below), whose sum is σ = 77195664. Its totient is φ = 76700200.

The previous prime is 76947911. The next prime is 76947943. The reversal of 76947931 is 13974967.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 76947931 - 2⁹ = 76947419 is a prime.

It is a super-2 number, since 2×76947931² = 11841968170361522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76947911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123400 + ... + 124021.

It is an arithmetic number, because the mean of its divisors is an integer number (19298916).

Almost surely, 2^76947931 is an apocalyptic number.

76947931 is a deficient number, since it is larger than the sum of its proper divisors (247733).

76947931 is a wasteful number, since it uses less digits than its factorization.

76947931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247732.

The product of its digits is 285768, while the sum is 46.

The square root of 76947931 is about 8771.9969790236. The cubic root of 76947931 is about 425.3361695489.

It can be divided in two parts, 7694 and 7931, that added together give a 6-th power (15625 = 5⁶).

The spelling of 76947931 in words is "seventy-six million, nine hundred forty-seven thousand, nine hundred thirty-one".