79993427 has 2 divisors, whose sum is σ = 79993428. Its totient is φ = 79993426.

The previous prime is 79993411. The next prime is 79993429. The reversal of 79993427 is 72439997.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79993427 - 2⁴ = 79993411 is a prime.

Together with 79993429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79993429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39996713 + 39996714.

It is an arithmetic number, because the mean of its divisors is an integer number (39996714).

Almost surely, 2^79993427 is an apocalyptic number.

79993427 is a deficient number, since it is larger than the sum of its proper divisors (1).

79993427 is an equidigital number, since it uses as much as digits as its factorization.

79993427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 50.

The square root of 79993427 is about 8943.9044605810. The cubic root of 79993427 is about 430.8751367671.

The spelling of 79993427 in words is "seventy-nine million, nine hundred ninety-three thousand, four hundred twenty-seven".