79493721 has 12 divisors (see below), whose sum is σ = 106715952. Its totient is φ = 52636024.

The previous prime is 79493719. The next prime is 79493747. The reversal of 79493721 is 12739497.

It is not a de Polignac number, because 79493721 - 2¹ = 79493719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79493761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95710 + ... + 96536.

It is an arithmetic number, because the mean of its divisors is an integer number (8892996).

Almost surely, 2^79493721 is an apocalyptic number.

It is an amenable number.

79493721 is a deficient number, since it is larger than the sum of its proper divisors (27222231).

79493721 is an equidigital number, since it uses as much as digits as its factorization.

79493721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188 (or 1009 counting only the distinct ones).

The product of its digits is 95256, while the sum is 42.

The square root of 79493721 is about 8915.9251342752. The cubic root of 79493721 is about 429.9760596010.

The spelling of 79493721 in words is "seventy-nine million, four hundred ninety-three thousand, seven hundred twenty-one".