78935279 has 2 divisors, whose sum is σ = 78935280. Its totient is φ = 78935278.

The previous prime is 78935261. The next prime is 78935309. The reversal of 78935279 is 97253987.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (97253987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78935279 - 2¹² = 78931183 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 (78932279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39467639 + 39467640.

It is an arithmetic number, because the mean of its divisors is an integer number (39467640).

Almost surely, 2^78935279 is an apocalyptic number.

78935279 is a deficient number, since it is larger than the sum of its proper divisors (1).

78935279 is an equidigital number, since it uses as much as digits as its factorization.

78935279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 50.

The square root of 78935279 is about 8884.5528306156. The cubic root of 78935279 is about 428.9668345358.

The spelling of 78935279 in words is "seventy-eight million, nine hundred thirty-five thousand, two hundred seventy-nine".