78934279 has 2 divisors, whose sum is σ = 78934280. Its totient is φ = 78934278.

The previous prime is 78934253. The next prime is 78934333. The reversal of 78934279 is 97243987.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78934279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78934249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39467139 + 39467140.

It is an arithmetic number, because the mean of its divisors is an integer number (39467140).

Almost surely, 2^78934279 is an apocalyptic number.

78934279 is a deficient number, since it is larger than the sum of its proper divisors (1).

78934279 is an equidigital number, since it uses as much as digits as its factorization.

78934279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 49.

The square root of 78934279 is about 8884.4965529849. The cubic root of 78934279 is about 428.9650230574.

The spelling of 78934279 in words is "seventy-eight million, nine hundred thirty-four thousand, two hundred seventy-nine".