79989525 has 192 divisors, whose sum is σ = 195225600. Its totient is φ = 31492800.

The previous prime is 79989521. The next prime is 79989529. The reversal of 79989525 is 52598997.

It is an interprime number because it is at equal distance from previous prime (79989521) and next prime (79989529).

It is not a de Polignac number, because 79989525 - 2² = 79989521 is a prime.

Its product of digits (2041200) is a multiple of the sum of its prime divisors (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79989521) 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 191 ways as a sum of consecutive naturals, for example, 4209966 + ... + 4209984.

It is an arithmetic number, because the mean of its divisors is an integer number (1016800).

Almost surely, 2^79989525 is an apocalyptic number.

79989525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

79989525 is an abundant number, since it is smaller than the sum of its proper divisors (115236075).

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

79989525 is a wasteful number, since it uses less digits than its factorization.

79989525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68 (or 45 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 54.

The square root of 79989525 is about 8943.6863205280. The cubic root of 79989525 is about 430.8681307660.

The spelling of 79989525 in words is "seventy-nine million, nine hundred eighty-nine thousand, five hundred twenty-five".