79966847 has 2 divisors, whose sum is σ = 79966848. Its totient is φ = 79966846.

The previous prime is 79966841. The next prime is 79966849. The reversal of 79966847 is 74866997.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79966847 - 2⁸ = 79966591 is a prime.

Together with 79966849, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 79966792 and 79966801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79966841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39983423 + 39983424.

It is an arithmetic number, because the mean of its divisors is an integer number (39983424).

Almost surely, 2^79966847 is an apocalyptic number.

79966847 is a deficient number, since it is larger than the sum of its proper divisors (1).

79966847 is an equidigital number, since it uses as much as digits as its factorization.

79966847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 56.

The square root of 79966847 is about 8942.4184089093. The cubic root of 79966847 is about 430.8274081379.

The spelling of 79966847 in words is "seventy-nine million, nine hundred sixty-six thousand, eight hundred forty-seven".