779899 has 2 divisors, whose sum is σ = 779900. Its totient is φ = 779898.

The previous prime is 779887. The next prime is 779927. The reversal of 779899 is 998977.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 779899 - 2⁷ = 779771 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (779869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389949 + 389950.

It is an arithmetic number, because the mean of its divisors is an integer number (389950).

2⁷⁷⁹⁸⁹⁹ is an apocalyptic number.

779899 is a deficient number, since it is larger than the sum of its proper divisors (1).

779899 is an equidigital number, since it uses as much as digits as its factorization.

779899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 49.

The square root of 779899 is about 883.1189047914. The cubic root of 779899 is about 92.0476674845.

The spelling of 779899 in words is "seven hundred seventy-nine thousand, eight hundred ninety-nine".