79639759 has 2 divisors, whose sum is σ = 79639760. Its totient is φ = 79639758.

The previous prime is 79639723. The next prime is 79639783. The reversal of 79639759 is 95793697.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79639759 - 2¹¹ = 79637711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79639789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39819879 + 39819880.

It is an arithmetic number, because the mean of its divisors is an integer number (39819880).

Almost surely, 2^79639759 is an apocalyptic number.

79639759 is a deficient number, since it is larger than the sum of its proper divisors (1).

79639759 is an equidigital number, since it uses as much as digits as its factorization.

79639759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3214890, while the sum is 55.

The square root of 79639759 is about 8924.1111041941. Note that the first 4 decimals coincide. The cubic root of 79639759 is about 430.2392016871.

The spelling of 79639759 in words is "seventy-nine million, six hundred thirty-nine thousand, seven hundred fifty-nine".