670994 has 8 divisors (see below), whose sum is σ = 1015740. Its totient is φ = 332416.

The previous prime is 670991. The next prime is 671003. The reversal of 670994 is 499076.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 405769 + 265225 = 637^2 + 515^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670991) 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, 1259 + ... + 1710.

2⁶⁷⁰⁹⁹⁴ is an apocalyptic number.

670994 is a deficient number, since it is larger than the sum of its proper divisors (344746).

670994 is a wasteful number, since it uses less digits than its factorization.

670994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 670994 is about 819.1422342915. The cubic root of 670994 is about 87.5466526726.

The spelling of 670994 in words is "six hundred seventy thousand, nine hundred ninety-four".