79718393 has 2 divisors, whose sum is σ = 79718394. Its totient is φ = 79718392.

The previous prime is 79718341. The next prime is 79718407. The reversal of 79718393 is 39381797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78712384 + 1006009 = 8872^2 + 1003^2 .

It is a cyclic number.

It is not a de Polignac number, because 79718393 - 2⁸ = 79718137 is a prime.

It is a super-3 number, since 3×79718393³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (79718323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39859196 + 39859197.

It is an arithmetic number, because the mean of its divisors is an integer number (39859197).

Almost surely, 2^79718393 is an apocalyptic number.

It is an amenable number.

79718393 is a deficient number, since it is larger than the sum of its proper divisors (1).

79718393 is an equidigital number, since it uses as much as digits as its factorization.

79718393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 47.

The square root of 79718393 is about 8928.5157221119. The cubic root of 79718393 is about 430.3807570324.

The spelling of 79718393 in words is "seventy-nine million, seven hundred eighteen thousand, three hundred ninety-three".