79682609 has 2 divisors, whose sum is σ = 79682610. Its totient is φ = 79682608.

The previous prime is 79682591. The next prime is 79682657. The reversal of 79682609 is 90628697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78712384 + 970225 = 8872^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 79682609 - 2⁸ = 79682353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79682699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39841304 + 39841305.

It is an arithmetic number, because the mean of its divisors is an integer number (39841305).

Almost surely, 2^79682609 is an apocalyptic number.

It is an amenable number.

79682609 is a deficient number, since it is larger than the sum of its proper divisors (1).

79682609 is an equidigital number, since it uses as much as digits as its factorization.

79682609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 79682609 is about 8926.5115806792. The cubic root of 79682609 is about 430.3163509425.

The spelling of 79682609 in words is "seventy-nine million, six hundred eighty-two thousand, six hundred nine".