670945 has 12 divisors (see below), whose sum is σ = 885780. Its totient is φ = 487520.

The previous prime is 670931. The next prime is 670951. The reversal of 670945 is 549076.

670945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 94864 + 576081 = 308^2 + 759^2 .

It is not a de Polignac number, because 670945 - 2¹⁵ = 638177 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51 + ... + 1159.

It is an arithmetic number, because the mean of its divisors is an integer number (73815).

2⁶⁷⁰⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

670945 is a deficient number, since it is larger than the sum of its proper divisors (214835).

670945 is a wasteful number, since it uses less digits than its factorization.

670945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136 (or 1125 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 670945 is about 819.1123244098. The cubic root of 670945 is about 87.5445215605.

The spelling of 670945 in words is "six hundred seventy thousand, nine hundred forty-five".