779489 has 2 divisors, whose sum is σ = 779490. Its totient is φ = 779488.

The previous prime is 779477. The next prime is 779507. The reversal of 779489 is 984977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 429025 + 350464 = 655^2 + 592^2 .

It is a cyclic number.

It is not a de Polignac number, because 779489 - 2¹² = 775393 is a prime.

It is a super-2 number, since 2×779489² = 1215206202242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (779189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389744 + 389745.

It is an arithmetic number, because the mean of its divisors is an integer number (389745).

2⁷⁷⁹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

779489 is a deficient number, since it is larger than the sum of its proper divisors (1).

779489 is an equidigital number, since it uses as much as digits as its factorization.

779489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 44.

The square root of 779489 is about 882.8867424534. The cubic root of 779489 is about 92.0315345584.

The spelling of 779489 in words is "seven hundred seventy-nine thousand, four hundred eighty-nine".