79678679 has 2 divisors, whose sum is σ = 79678680. Its totient is φ = 79678678.

The previous prime is 79678639. The next prime is 79678717. The reversal of 79678679 is 97687697.

It is a strong prime.

It is an emirp because it is prime and its reverse (97687697) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79678679 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79678619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39839339 + 39839340.

It is an arithmetic number, because the mean of its divisors is an integer number (39839340).

Almost surely, 2^79678679 is an apocalyptic number.

79678679 is a deficient number, since it is larger than the sum of its proper divisors (1).

79678679 is an equidigital number, since it uses as much as digits as its factorization.

79678679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8001504, while the sum is 59.

The square root of 79678679 is about 8926.2914471801. The cubic root of 79678679 is about 430.3092763287.

The spelling of 79678679 in words is "seventy-nine million, six hundred seventy-eight thousand, six hundred seventy-nine".