779939 has 2 divisors, whose sum is σ = 779940. Its totient is φ = 779938.

The previous prime is 779927. The next prime is 779971. The reversal of 779939 is 939977.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-779939 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 779939.

It is not a weakly prime, because it can be changed into another prime (779039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389969 + 389970.

It is an arithmetic number, because the mean of its divisors is an integer number (389970).

2⁷⁷⁹⁹³⁹ is an apocalyptic number.

779939 is a deficient number, since it is larger than the sum of its proper divisors (1).

779939 is an equidigital number, since it uses as much as digits as its factorization.

779939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107163, while the sum is 44.

The square root of 779939 is about 883.1415515080. The cubic root of 779939 is about 92.0492411258.

The spelling of 779939 in words is "seven hundred seventy-nine thousand, nine hundred thirty-nine".