79862721 has 8 divisors (see below), whose sum is σ = 106526784. Its totient is φ = 53220240.

The previous prime is 79862689. The next prime is 79862737. The reversal of 79862721 is 12726897.

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

It is not a de Polignac number, because 79862721 - 2⁵ = 79862689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79862771) 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, 7980 + ... + 14946.

It is an arithmetic number, because the mean of its divisors is an integer number (13315848).

Almost surely, 2^79862721 is an apocalyptic number.

It is an amenable number.

79862721 is a deficient number, since it is larger than the sum of its proper divisors (26664063).

79862721 is a wasteful number, since it uses less digits than its factorization.

79862721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10791.

The product of its digits is 84672, while the sum is 42.

The square root of 79862721 is about 8936.5944855968. The cubic root of 79862721 is about 430.6403313614.

The spelling of 79862721 in words is "seventy-nine million, eight hundred sixty-two thousand, seven hundred twenty-one".