79323709 has 2 divisors, whose sum is σ = 79323710. Its totient is φ = 79323708.

The previous prime is 79323707. The next prime is 79323731. The reversal of 79323709 is 90732397.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43956900 + 35366809 = 6630^2 + 5947^2 .

It is a cyclic number.

It is not a de Polignac number, because 79323709 - 2¹ = 79323707 is a prime.

Together with 79323707, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79323707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39661854 + 39661855.

It is an arithmetic number, because the mean of its divisors is an integer number (39661855).

Almost surely, 2^79323709 is an apocalyptic number.

It is an amenable number.

79323709 is a deficient number, since it is larger than the sum of its proper divisors (1).

79323709 is an equidigital number, since it uses as much as digits as its factorization.

79323709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71442, while the sum is 40.

The square root of 79323709 is about 8906.3858551042. The cubic root of 79323709 is about 429.6693130876.

The spelling of 79323709 in words is "seventy-nine million, three hundred twenty-three thousand, seven hundred nine".