79730139 has 4 divisors (see below), whose sum is σ = 106306856. Its totient is φ = 53153424.

The previous prime is 79730113. The next prime is 79730159. The reversal of 79730139 is 93103797.

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

It is not a de Polignac number, because 79730139 - 2⁷ = 79730011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79730097 and 79730106.

It is not an unprimeable number, because it can be changed into a prime (79730159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13288354 + ... + 13288359.

It is an arithmetic number, because the mean of its divisors is an integer number (26576714).

Almost surely, 2^79730139 is an apocalyptic number.

79730139 is a deficient number, since it is larger than the sum of its proper divisors (26576717).

79730139 is a wasteful number, since it uses less digits than its factorization.

79730139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26576716.

The product of its (nonzero) digits is 35721, while the sum is 39.

The square root of 79730139 is about 8929.1734779878. The cubic root of 79730139 is about 430.4018939533.

The spelling of 79730139 in words is "seventy-nine million, seven hundred thirty thousand, one hundred thirty-nine".