1673943 has 4 divisors (see below), whose sum is σ = 2231928. Its totient is φ = 1115960.

The previous prime is 1673941. The next prime is 1673951. The reversal of 1673943 is 3493761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3493761 = 3 ⋅1164587.

It is a cyclic number.

It is not a de Polignac number, because 1673943 - 2¹ = 1673941 is a prime.

It is a D-number.

1673943 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1673941) 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, 278988 + ... + 278993.

It is an arithmetic number, because the mean of its divisors is an integer number (557982).

2^1673943 is an apocalyptic number.

1673943 is a deficient number, since it is larger than the sum of its proper divisors (557985).

1673943 is an equidigital number, since it uses as much as digits as its factorization.

1673943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557984.

The product of its digits is 13608, while the sum is 33.

The square root of 1673943 is about 1293.8094913858. The cubic root of 1673943 is about 118.7354006059.

The spelling of 1673943 in words is "one million, six hundred seventy-three thousand, nine hundred forty-three".