78712679 has 2 divisors, whose sum is σ = 78712680. Its totient is φ = 78712678.

The previous prime is 78712657. The next prime is 78712681. The reversal of 78712679 is 97621787.

It is a strong prime.

It is an emirp because it is prime and its reverse (97621787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78712679 - 2⁸ = 78712423 is a prime.

Together with 78712681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78712619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39356339 + 39356340.

It is an arithmetic number, because the mean of its divisors is an integer number (39356340).

Almost surely, 2^78712679 is an apocalyptic number.

78712679 is a deficient number, since it is larger than the sum of its proper divisors (1).

78712679 is an equidigital number, since it uses as much as digits as its factorization.

78712679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 47.

The square root of 78712679 is about 8872.0166253226. The cubic root of 78712679 is about 428.5632215201.

The spelling of 78712679 in words is "seventy-eight million, seven hundred twelve thousand, six hundred seventy-nine".