79776747 has 12 divisors (see below), whose sum is σ = 115413064. Its totient is φ = 53101440.

The previous prime is 79776737. The next prime is 79776761. The reversal of 79776747 is 74767797.

It is not a de Polignac number, because 79776747 - 2⁴ = 79776731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79776693 and 79776702.

It is not an unprimeable number, because it can be changed into a prime (79776707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 529 + ... + 12642.

Almost surely, 2^79776747 is an apocalyptic number.

79776747 is a deficient number, since it is larger than the sum of its proper divisors (35636317).

79776747 is a wasteful number, since it uses less digits than its factorization.

79776747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13850 (or 13847 counting only the distinct ones).

The product of its digits is 3630312, while the sum is 54.

The square root of 79776747 is about 8931.7829687023. The cubic root of 79776747 is about 430.4857445696.

The spelling of 79776747 in words is "seventy-nine million, seven hundred seventy-six thousand, seven hundred forty-seven".