78080279 has 2 divisors, whose sum is σ = 78080280. Its totient is φ = 78080278.

The previous prime is 78080257. The next prime is 78080281. The reversal of 78080279 is 97208087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78080279 - 2¹⁶ = 78014743 is a prime.

It is a Sophie Germain prime.

Together with 78080281, 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 (78080879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39040139 + 39040140.

It is an arithmetic number, because the mean of its divisors is an integer number (39040140).

Almost surely, 2^78080279 is an apocalyptic number.

78080279 is a deficient number, since it is larger than the sum of its proper divisors (1).

78080279 is an equidigital number, since it uses as much as digits as its factorization.

78080279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 78080279 is about 8836.3046009064. The cubic root of 78080279 is about 427.4124011433.

The spelling of 78080279 in words is "seventy-eight million, eighty thousand, two hundred seventy-nine".