779609 has 2 divisors, whose sum is σ = 779610. Its totient is φ = 779608.

The previous prime is 779599. The next prime is 779617. The reversal of 779609 is 906977.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 635209 + 144400 = 797^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 779609 - 2⁴ = 779593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (779659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389804 + 389805.

It is an arithmetic number, because the mean of its divisors is an integer number (389805).

2⁷⁷⁹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

779609 is a deficient number, since it is larger than the sum of its proper divisors (1).

779609 is an equidigital number, since it uses as much as digits as its factorization.

779609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 779609 is about 882.9546987247. The cubic root of 779609 is about 92.0362569759.

The spelling of 779609 in words is "seven hundred seventy-nine thousand, six hundred nine".