79939671 has 16 divisors (see below), whose sum is σ = 122396928. Its totient is φ = 45460800.

The previous prime is 79939663. The next prime is 79939679. The reversal of 79939671 is 17693997.

It is an interprime number because it is at equal distance from previous prime (79939663) and next prime (79939679).

It is not a de Polignac number, because 79939671 - 2³ = 79939663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79939679) 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 15 ways as a sum of consecutive naturals, for example, 4590 + ... + 13451.

It is an arithmetic number, because the mean of its divisors is an integer number (7649808).

Almost surely, 2^79939671 is an apocalyptic number.

79939671 is a deficient number, since it is larger than the sum of its proper divisors (42457257).

79939671 is a wasteful number, since it uses less digits than its factorization.

79939671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18262.

The product of its digits is 642978, while the sum is 51.

The square root of 79939671 is about 8940.8987803240. The cubic root of 79939671 is about 430.7785983597.

It can be divided in two parts, 799 and 39671, that added together give a triangular number (40470 = T₂₈₄).

The spelling of 79939671 in words is "seventy-nine million, nine hundred thirty-nine thousand, six hundred seventy-one".