677678839 has 6 divisors (see below), whose sum is σ = 693807216. Its totient is φ = 661917060.

The previous prime is 677678809. The next prime is 677678849. The reversal of 677678839 is 938876776.

It is not a de Polignac number, because 677678839 - 2⁷ = 677678711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677678809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 181407 + ... + 185104.

It is an arithmetic number, because the mean of its divisors is an integer number (115634536).

Almost surely, 2^677678839 is an apocalyptic number.

677678839 is a deficient number, since it is larger than the sum of its proper divisors (16128377).

677678839 is an equidigital number, since it uses as much as digits as its factorization.

677678839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366597 (or 366554 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 61.

The square root of 677678839 is about 26032.2653451443. The cubic root of 677678839 is about 878.3642301201.

The spelling of 677678839 in words is "six hundred seventy-seven million, six hundred seventy-eight thousand, eight hundred thirty-nine".