76864921 has 8 divisors (see below), whose sum is σ = 87946880. Its totient is φ = 65808288.

The previous prime is 76864901. The next prime is 76864961. The reversal of 76864921 is 12946867.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 76864921 - 2⁷ = 76864793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76864901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700 + ... + 12418.

It is an arithmetic number, because the mean of its divisors is an integer number (10993360).

Almost surely, 2^76864921 is an apocalyptic number.

It is an amenable number.

76864921 is a deficient number, since it is larger than the sum of its proper divisors (11081959).

76864921 is a wasteful number, since it uses less digits than its factorization.

76864921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12663.

The product of its digits is 145152, while the sum is 43.

The square root of 76864921 is about 8767.2641684849. The cubic root of 76864921 is about 425.1831662611.

The spelling of 76864921 in words is "seventy-six million, eight hundred sixty-four thousand, nine hundred twenty-one".