1670289 has 4 divisors (see below), whose sum is σ = 2227056. Its totient is φ = 1113524.

The previous prime is 1670287. The next prime is 1670303. The reversal of 1670289 is 9820761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1670289 - 2¹ = 1670287 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1670281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278379 + ... + 278384.

It is an arithmetic number, because the mean of its divisors is an integer number (556764).

2^1670289 is an apocalyptic number.

It is an amenable number.

1670289 is a deficient number, since it is larger than the sum of its proper divisors (556767).

1670289 is an equidigital number, since it uses as much as digits as its factorization.

1670289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556766.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 1670289 is about 1292.3966109519. The cubic root of 1670289 is about 118.6489430178.

The spelling of 1670289 in words is "one million, six hundred seventy thousand, two hundred eighty-nine".