1670443 has 4 divisors (see below), whose sum is σ = 1674000. Its totient is φ = 1666888.

The previous prime is 1670419. The next prime is 1670447. The reversal of 1670443 is 3440761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3440761 = 41 ⋅83921.

It is a cyclic number.

It is not a de Polignac number, because 1670443 - 2⁵ = 1670411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1670447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943 + ... + 2056.

It is an arithmetic number, because the mean of its divisors is an integer number (418500).

2^1670443 is an apocalyptic number.

1670443 is a deficient number, since it is larger than the sum of its proper divisors (3557).

1670443 is an equidigital number, since it uses as much as digits as its factorization.

1670443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3556.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 1670443 is about 1292.4561888126. The cubic root of 1670443 is about 118.6525893680.

The spelling of 1670443 in words is "one million, six hundred seventy thousand, four hundred forty-three".