670009 has 4 divisors (see below), whose sum is σ = 671716. Its totient is φ = 668304.

The previous prime is 670001. The next prime is 670031. The reversal of 670009 is 900076.

670009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 313600 + 356409 = 560^2 + 597^2 .

It is a cyclic number.

It is not a de Polignac number, because 670009 - 2³ = 670001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670001) 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, 67 + ... + 1159.

It is an arithmetic number, because the mean of its divisors is an integer number (167929).

2⁶⁷⁰⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

670009 is a deficient number, since it is larger than the sum of its proper divisors (1707).

670009 is a wasteful number, since it uses less digits than its factorization.

670009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 670009 is about 818.5407747938. The cubic root of 670009 is about 87.5037930329.

The spelling of 670009 in words is "six hundred seventy thousand, nine".