79728719 has 8 divisors (see below), whose sum is σ = 91228800. Its totient is φ = 68256216.

The previous prime is 79728709. The next prime is 79728749. The reversal of 79728719 is 91782797.

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

It is not a de Polignac number, because 79728719 - 2⁴ = 79728703 is a prime.

It is a super-2 number, since 2×79728719² = 12713337266761922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79728709) 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, 269 + ... + 12630.

It is an arithmetic number, because the mean of its divisors is an integer number (11403600).

Almost surely, 2^79728719 is an apocalyptic number.

79728719 is a deficient number, since it is larger than the sum of its proper divisors (11500081).

79728719 is a wasteful number, since it uses less digits than its factorization.

79728719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13789.

The product of its digits is 444528, while the sum is 50.

The square root of 79728719 is about 8929.0939629953. The cubic root of 79728719 is about 430.3993387744.

The spelling of 79728719 in words is "seventy-nine million, seven hundred twenty-eight thousand, seven hundred nineteen".