778270079 has 2 divisors, whose sum is σ = 778270080. Its totient is φ = 778270078.

The previous prime is 778270037. The next prime is 778270123. The reversal of 778270079 is 970072877.

It is a weak prime.

It is an emirp because it is prime and its reverse (970072877) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 778270079 - 2²⁰ = 777221503 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 (778270579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389135039 + 389135040.

It is an arithmetic number, because the mean of its divisors is an integer number (389135040).

Almost surely, 2^778270079 is an apocalyptic number.

778270079 is a deficient number, since it is larger than the sum of its proper divisors (1).

778270079 is an equidigital number, since it uses as much as digits as its factorization.

778270079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345744, while the sum is 47.

The square root of 778270079 is about 27897.4923425028. The cubic root of 778270079 is about 919.8353828811.

The spelling of 778270079 in words is "seven hundred seventy-eight million, two hundred seventy thousand, seventy-nine".