1670009 has 8 divisors (see below), whose sum is σ = 1835328. Its totient is φ = 1506960.

The previous prime is 1670003. The next prime is 1670017. The reversal of 1670009 is 9000761.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1670009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670003) 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, 1244 + ... + 2210.

It is an arithmetic number, because the mean of its divisors is an integer number (229416).

2^1670009 is an apocalyptic number.

It is an amenable number.

1670009 is a deficient number, since it is larger than the sum of its proper divisors (165319).

1670009 is a wasteful number, since it uses less digits than its factorization.

1670009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 1670009 is about 1292.2882805319. The cubic root of 1670009 is about 118.6423127160.

The spelling of 1670009 in words is "one million, six hundred seventy thousand, nine".