78673379 has 2 divisors, whose sum is σ = 78673380. Its totient is φ = 78673378.

The previous prime is 78673351. The next prime is 78673391. The reversal of 78673379 is 97337687.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78673379 - 2⁸ = 78673123 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78673339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39336689 + 39336690.

It is an arithmetic number, because the mean of its divisors is an integer number (39336690).

Almost surely, 2^78673379 is an apocalyptic number.

78673379 is a deficient number, since it is larger than the sum of its proper divisors (1).

78673379 is an equidigital number, since it uses as much as digits as its factorization.

78673379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 50.

The square root of 78673379 is about 8869.8015197636. The cubic root of 78673379 is about 428.4918846924.

The spelling of 78673379 in words is "seventy-eight million, six hundred seventy-three thousand, three hundred seventy-nine".