78708379 has 2 divisors, whose sum is σ = 78708380. Its totient is φ = 78708378.

The previous prime is 78708373. The next prime is 78708389. The reversal of 78708379 is 97380787.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78708379 - 2⁷ = 78708251 is a prime.

It is not a weakly prime, because it can be changed into another prime (78708373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39354189 + 39354190.

It is an arithmetic number, because the mean of its divisors is an integer number (39354190).

Almost surely, 2^78708379 is an apocalyptic number.

78708379 is a deficient number, since it is larger than the sum of its proper divisors (1).

78708379 is an equidigital number, since it uses as much as digits as its factorization.

78708379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 49.

The square root of 78708379 is about 8871.7742870296. The cubic root of 78708379 is about 428.5554173754. Note that the first 3 decimals are identical.

The spelling of 78708379 in words is "seventy-eight million, seven hundred eight thousand, three hundred seventy-nine".