79877925 has 36 divisors (see below), whose sum is σ = 144427140. Its totient is φ = 42197760.

The previous prime is 79877923. The next prime is 79877929. The reversal of 79877925 is 52977897.

It can be written as a sum of positive squares in 6 ways, for example, as 1979649 + 77898276 = 1407^2 + 8826^2 .

It is not a de Polignac number, because 79877925 - 2¹ = 79877923 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79877921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 22897 + ... + 26153.

It is an arithmetic number, because the mean of its divisors is an integer number (4011865).

Almost surely, 2^79877925 is an apocalyptic number.

79877925 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

79877925 is a deficient number, since it is larger than the sum of its proper divisors (64549215).

79877925 is a wasteful number, since it uses less digits than its factorization.

79877925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3382 (or 3374 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The square root of 79877925 is about 8937.4451047265. The cubic root of 79877925 is about 430.6676575868.

The spelling of 79877925 in words is "seventy-nine million, eight hundred seventy-seven thousand, nine hundred twenty-five".