677399309 has 2 divisors, whose sum is σ = 677399310. Its totient is φ = 677399308.

The previous prime is 677399291. The next prime is 677399311. The reversal of 677399309 is 903993776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 634536100 + 42863209 = 25190^2 + 6547^2 .

It is a cyclic number.

It is not a de Polignac number, because 677399309 - 2²⁴ = 660622093 is a prime.

Together with 677399311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677399329) 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, 338699654 + 338699655.

It is an arithmetic number, because the mean of its divisors is an integer number (338699655).

Almost surely, 2^677399309 is an apocalyptic number.

It is an amenable number.

677399309 is a deficient number, since it is larger than the sum of its proper divisors (1).

677399309 is an equidigital number, since it uses as much as digits as its factorization.

677399309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1928934, while the sum is 53.

The square root of 677399309 is about 26026.8958771499. The cubic root of 677399309 is about 878.2434438393.

The spelling of 677399309 in words is "six hundred seventy-seven million, three hundred ninety-nine thousand, three hundred nine".