79816725 has 24 divisors (see below), whose sum is σ = 146627520. Its totient is φ = 42568560.

The previous prime is 79816721. The next prime is 79816727. The reversal of 79816725 is 52761897.

It is not a de Polignac number, because 79816725 - 2² = 79816721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79816721) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 58449 + ... + 59798.

It is an arithmetic number, because the mean of its divisors is an integer number (6109480).

Almost surely, 2^79816725 is an apocalyptic number.

79816725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

79816725 is a deficient number, since it is larger than the sum of its proper divisors (66810795).

79816725 is a wasteful number, since it uses less digits than its factorization.

79816725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118266 (or 118255 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 79816725 is about 8934.0206514201. The cubic root of 79816725 is about 430.5576413974.

It can be divided in two parts, 7981 and 6725, that added together give a triangular number (14706 = T₁₇₁).

The spelling of 79816725 in words is "seventy-nine million, eight hundred sixteen thousand, seven hundred twenty-five".