79697904 has 160 divisors (see below), whose sum is σ = 256483584. Its totient is φ = 20951040.

The previous prime is 79697899. The next prime is 79697923. The reversal of 79697904 is 40979697.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116347 + ... + 117029.

Almost surely, 2^79697904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79697904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128241792).

79697904 is an abundant number, since it is smaller than the sum of its proper divisors (176785680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79697904 is a wasteful number, since it uses less digits than its factorization.

79697904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 857304, while the sum is 51.

The square root of 79697904 is about 8927.3682572189. The cubic root of 79697904 is about 430.3438821174.

It can be divided in two parts, 79697 and 904, that added together give a triangular number (80601 = T₄₀₁).

The spelling of 79697904 in words is "seventy-nine million, six hundred ninety-seven thousand, nine hundred four".