670831 has 8 divisors (see below), whose sum is σ = 783360. Its totient is φ = 562488.

The previous prime is 670823. The next prime is 670849. The reversal of 670831 is 138076.

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 670831 - 2³ = 670823 is a prime.

It is a super-2 number, since 2×670831² = 900028461122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 670796 and 670805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670811) 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, 691 + ... + 1348.

It is an arithmetic number, because the mean of its divisors is an integer number (97920).

2⁶⁷⁰⁸³¹ is an apocalyptic number.

670831 is a deficient number, since it is larger than the sum of its proper divisors (112529).

670831 is a wasteful number, since it uses less digits than its factorization.

670831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2093.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 670831 is about 819.0427339278. The cubic root of 670831 is about 87.5395630613.

The spelling of 670831 in words is "six hundred seventy thousand, eight hundred thirty-one".