670839 has 16 divisors (see below), whose sum is σ = 978432. Its totient is φ = 406368.

The previous prime is 670823. The next prime is 670849. The reversal of 670839 is 938076.

It is a happy number.

It is not a de Polignac number, because 670839 - 2⁴ = 670823 is a prime.

670839 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3934 + ... + 4100.

It is an arithmetic number, because the mean of its divisors is an integer number (61152).

2⁶⁷⁰⁸³⁹ is an apocalyptic number.

670839 is a deficient number, since it is larger than the sum of its proper divisors (307593).

670839 is a wasteful number, since it uses less digits than its factorization.

670839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 670839 is about 819.0476176633. The cubic root of 670839 is about 87.5399110445.

The spelling of 670839 in words is "six hundred seventy thousand, eight hundred thirty-nine".