677931 has 4 divisors (see below), whose sum is σ = 903912. Its totient is φ = 451952.

The previous prime is 677927. The next prime is 677947. The reversal of 677931 is 139776.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 677931 - 2² = 677927 is a prime.

It is a super-2 number, since 2×677931² = 919180881522, which contains 22 as substring.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 677892 and 677901.

It is not an unprimeable number, because it can be changed into a prime (677231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112986 + ... + 112991.

It is an arithmetic number, because the mean of its divisors is an integer number (225978).

2⁶⁷⁷⁹³¹ is an apocalyptic number.

677931 is a deficient number, since it is larger than the sum of its proper divisors (225981).

677931 is a wasteful number, since it uses less digits than its factorization.

677931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225980.

The product of its digits is 7938, while the sum is 33.

The square root of 677931 is about 823.3656538865. The cubic root of 677931 is about 87.8473161630.

The spelling of 677931 in words is "six hundred seventy-seven thousand, nine hundred thirty-one".