79569689 has 2 divisors, whose sum is σ = 79569690. Its totient is φ = 79569688.

The previous prime is 79569671. The next prime is 79569697. The reversal of 79569689 is 98696597.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66667225 + 12902464 = 8165^2 + 3592^2 .

It is a cyclic number.

It is not a de Polignac number, because 79569689 - 2¹⁶ = 79504153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79569619) 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 as a sum of consecutive naturals, namely, 39784844 + 39784845.

It is an arithmetic number, because the mean of its divisors is an integer number (39784845).

Almost surely, 2^79569689 is an apocalyptic number.

It is an amenable number.

79569689 is a deficient number, since it is larger than the sum of its proper divisors (1).

79569689 is an equidigital number, since it uses as much as digits as its factorization.

79569689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7348320, while the sum is 59.

The square root of 79569689 is about 8920.1843590814. The cubic root of 79569689 is about 430.1129845521.

The spelling of 79569689 in words is "seventy-nine million, five hundred sixty-nine thousand, six hundred eighty-nine".