677139839 has 2 divisors, whose sum is σ = 677139840. Its totient is φ = 677139838.

The previous prime is 677139823. The next prime is 677139893. The reversal of 677139839 is 938931776.

It is a happy number.

Together with next prime (677139893) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 677139839 - 2⁴ = 677139823 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677139809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338569919 + 338569920.

It is an arithmetic number, because the mean of its divisors is an integer number (338569920).

Almost surely, 2^677139839 is an apocalyptic number.

677139839 is a deficient number, since it is larger than the sum of its proper divisors (1).

677139839 is an equidigital number, since it uses as much as digits as its factorization.

677139839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 53.

The square root of 677139839 is about 26021.9107484443. The cubic root of 677139839 is about 878.1312958419.

The spelling of 677139839 in words is "six hundred seventy-seven million, one hundred thirty-nine thousand, eight hundred thirty-nine".