677631 has 8 divisors (see below), whose sum is σ = 912384. Its totient is φ = 447320.

The previous prime is 677627. The next prime is 677639. The reversal of 677631 is 136776.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 677631 - 2² = 677627 is a prime.

It is a super-2 number, since 2×677631² = 918367544322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735 + ... + 1376.

It is an arithmetic number, because the mean of its divisors is an integer number (114048).

2⁶⁷⁷⁶³¹ is an apocalyptic number.

677631 is a deficient number, since it is larger than the sum of its proper divisors (234753).

677631 is a wasteful number, since it uses less digits than its factorization.

677631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221.

The product of its digits is 5292, while the sum is 30.

The square root of 677631 is about 823.1834546442. The cubic root of 677631 is about 87.8343561010.

The spelling of 677631 in words is "six hundred seventy-seven thousand, six hundred thirty-one".