79818667 has 2 divisors, whose sum is σ = 79818668. Its totient is φ = 79818666.

The previous prime is 79818623. The next prime is 79818703. The reversal of 79818667 is 76681897.

It is a strong prime.

It is an emirp because it is prime and its reverse (76681897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79818667 - 2⁷ = 79818539 is a prime.

It is not a weakly prime, because it can be changed into another prime (79818467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39909333 + 39909334.

It is an arithmetic number, because the mean of its divisors is an integer number (39909334).

Almost surely, 2^79818667 is an apocalyptic number.

79818667 is a deficient number, since it is larger than the sum of its proper divisors (1).

79818667 is an equidigital number, since it uses as much as digits as its factorization.

79818667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 52.

The square root of 79818667 is about 8934.1293364267. The cubic root of 79818667 is about 430.5611332978.

The spelling of 79818667 in words is "seventy-nine million, eight hundred eighteen thousand, six hundred sixty-seven".