79722709 has 8 divisors (see below), whose sum is σ = 87769440. Its totient is φ = 71809200.

The previous prime is 79722691. The next prime is 79722739. The reversal of 79722709 is 90722797.

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

It is not a de Polignac number, because 79722709 - 2⁵ = 79722677 is a prime.

It is a super-3 number, since 3×79722709³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79722739) 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, 32047 + ... + 34444.

It is an arithmetic number, because the mean of its divisors is an integer number (10971180).

Almost surely, 2^79722709 is an apocalyptic number.

It is an amenable number.

79722709 is a deficient number, since it is larger than the sum of its proper divisors (8046731).

79722709 is a wasteful number, since it uses less digits than its factorization.

79722709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66611.

The product of its (nonzero) digits is 111132, while the sum is 43.

The square root of 79722709 is about 8928.7574163486. The cubic root of 79722709 is about 430.3885239134.

The spelling of 79722709 in words is "seventy-nine million, seven hundred twenty-two thousand, seven hundred nine".