79896609 has 18 divisors (see below), whose sum is σ = 124968870. Its totient is φ = 49166208.

The previous prime is 79896559. The next prime is 79896643. The reversal of 79896609 is 90669897.

It can be written as a sum of positive squares in 3 ways, for example, as 7306209 + 72590400 = 2703^2 + 8520^2 .

It is a de Polignac number, because none of the positive numbers 2^k-79896609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79896409) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 24744 + ... + 27785.

It is an arithmetic number, because the mean of its divisors is an integer number (6942715).

Almost surely, 2^79896609 is an apocalyptic number.

It is an amenable number.

79896609 is a deficient number, since it is larger than the sum of its proper divisors (45072261).

79896609 is a wasteful number, since it uses less digits than its factorization.

79896609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52561 (or 52545 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 79896609 is about 8938.4903087714. The cubic root of 79896609 is about 430.7012336852.

The spelling of 79896609 in words is "seventy-nine million, eight hundred ninety-six thousand, six hundred nine".