79720307 has 4 divisors (see below), whose sum is σ = 80812440. Its totient is φ = 78628176.

The previous prime is 79720283. The next prime is 79720309. The reversal of 79720307 is 70302797.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79720307 - 2¹² = 79716211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79720309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545957 + ... + 546102.

It is an arithmetic number, because the mean of its divisors is an integer number (20203110).

Almost surely, 2^79720307 is an apocalyptic number.

79720307 is a deficient number, since it is larger than the sum of its proper divisors (1092133).

79720307 is a wasteful number, since it uses less digits than its factorization.

79720307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092132.

The product of its (nonzero) digits is 18522, while the sum is 35.

The square root of 79720307 is about 8928.6229061373. The cubic root of 79720307 is about 430.3842014160.

The spelling of 79720307 in words is "seventy-nine million, seven hundred twenty thousand, three hundred seven".