79821325 has 12 divisors (see below), whose sum is σ = 99095220. Its totient is φ = 63781760.

The previous prime is 79821323. The next prime is 79821331. The reversal of 79821325 is 52312897.

It can be written as a sum of positive squares in 6 ways, for example, as 58564 + 79762761 = 242^2 + 8931^2 .

It is not a de Polignac number, because 79821325 - 2¹ = 79821323 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79821323) 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 11 ways as a sum of consecutive naturals, for example, 30987 + ... + 33463.

It is an arithmetic number, because the mean of its divisors is an integer number (8257935).

Almost surely, 2^79821325 is an apocalyptic number.

It is an amenable number.

79821325 is a deficient number, since it is larger than the sum of its proper divisors (19273895).

79821325 is a wasteful number, since it uses less digits than its factorization.

79821325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3776 (or 3771 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 79821325 is about 8934.2780905902. The cubic root of 79821325 is about 430.5659125423.

The spelling of 79821325 in words is "seventy-nine million, eight hundred twenty-one thousand, three hundred twenty-five".