79131285 has 24 divisors (see below), whose sum is σ = 141892920. Its totient is φ = 40747392.

The previous prime is 79131281. The next prime is 79131289. The reversal of 79131285 is 58213197.

It is an interprime number because it is at equal distance from previous prime (79131281) and next prime (79131289).

It can be written as a sum of positive squares in 4 ways, for example, as 31438449 + 47692836 = 5607^2 + 6906^2 .

It is not a de Polignac number, because 79131285 - 2² = 79131281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79131281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29014 + ... + 31623.

It is an arithmetic number, because the mean of its divisors is an integer number (5912205).

Almost surely, 2^79131285 is an apocalyptic number.

It is an amenable number.

79131285 is a deficient number, since it is larger than the sum of its proper divisors (62761635).

79131285 is a wasteful number, since it uses less digits than its factorization.

79131285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60677 (or 60674 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 79131285 is about 8895.5767098036. The cubic root of 79131285 is about 429.3216001808.

The spelling of 79131285 in words is "seventy-nine million, one hundred thirty-one thousand, two hundred eighty-five".