79664321 has 8 divisors (see below), whose sum is σ = 91480800. Its totient is φ = 68610240.

The previous prime is 79664317. The next prime is 79664357. The reversal of 79664321 is 12346697.

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

It is a cyclic number.

It is not a de Polignac number, because 79664321 - 2² = 79664317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79664021) 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, 190376 + ... + 190793.

It is an arithmetic number, because the mean of its divisors is an integer number (11435100).

Almost surely, 2^79664321 is an apocalyptic number.

It is an amenable number.

79664321 is a deficient number, since it is larger than the sum of its proper divisors (11816479).

79664321 is a wasteful number, since it uses less digits than its factorization.

79664321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381199.

The product of its digits is 54432, while the sum is 38.

The square root of 79664321 is about 8925.4871575730. The cubic root of 79664321 is about 430.2834277085.

The spelling of 79664321 in words is "seventy-nine million, six hundred sixty-four thousand, three hundred twenty-one".