79691672 has 8 divisors (see below), whose sum is σ = 149421900. Its totient is φ = 39845832.

The previous prime is 79691671. The next prime is 79691683. The reversal of 79691672 is 27619697.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79691671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4980722 + ... + 4980737.

Almost surely, 2^79691672 is an apocalyptic number.

It is an amenable number.

79691672 is a deficient number, since it is larger than the sum of its proper divisors (69730228).

79691672 is a wasteful number, since it uses less digits than its factorization.

79691672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9961465 (or 9961461 counting only the distinct ones).

The product of its digits is 285768, while the sum is 47.

The square root of 79691672 is about 8927.0192113605. The cubic root of 79691672 is about 430.3326648714.

The spelling of 79691672 in words is "seventy-nine million, six hundred ninety-one thousand, six hundred seventy-two".