79685993 has 2 divisors, whose sum is σ = 79685994. Its totient is φ = 79685992.

The previous prime is 79685951. The next prime is 79685999. The reversal of 79685993 is 39958697.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58415449 + 21270544 = 7643^2 + 4612^2 .

It is a cyclic number.

It is not a de Polignac number, because 79685993 - 2⁶ = 79685929 is a prime.

It is not a weakly prime, because it can be changed into another prime (79685999) 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, 39842996 + 39842997.

It is an arithmetic number, because the mean of its divisors is an integer number (39842997).

Almost surely, 2^79685993 is an apocalyptic number.

It is an amenable number.

79685993 is a deficient number, since it is larger than the sum of its proper divisors (1).

79685993 is an equidigital number, since it uses as much as digits as its factorization.

79685993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3674160, while the sum is 56.

The square root of 79685993 is about 8926.7011263960. The cubic root of 79685993 is about 430.3224424847.

The spelling of 79685993 in words is "seventy-nine million, six hundred eighty-five thousand, nine hundred ninety-three".