79677885 has 16 divisors (see below), whose sum is σ = 145696896. Its totient is φ = 36424128.

The previous prime is 79677881. The next prime is 79677893. The reversal of 79677885 is 58877697.

It is not a de Polignac number, because 79677885 - 2² = 79677881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79677881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379314 + ... + 379523.

It is an arithmetic number, because the mean of its divisors is an integer number (9106056).

Almost surely, 2^79677885 is an apocalyptic number.

It is an amenable number.

79677885 is a deficient number, since it is larger than the sum of its proper divisors (66019011).

79677885 is a wasteful number, since it uses less digits than its factorization.

79677885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758852.

The product of its digits is 5927040, while the sum is 57.

The square root of 79677885 is about 8926.2469717121. The cubic root of 79677885 is about 430.3078469764.

The spelling of 79677885 in words is "seventy-nine million, six hundred seventy-seven thousand, eight hundred eighty-five".