1673689 has 4 divisors (see below), whose sum is σ = 1712656. Its totient is φ = 1634724.

The previous prime is 1673681. The next prime is 1673713. The reversal of 1673689 is 9863761.

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 1673689 - 2³ = 1673681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1673681) 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, 19419 + ... + 19504.

It is an arithmetic number, because the mean of its divisors is an integer number (428164).

2^1673689 is an apocalyptic number.

It is an amenable number.

1673689 is a deficient number, since it is larger than the sum of its proper divisors (38967).

1673689 is an equidigital number, since it uses as much as digits as its factorization.

1673689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38966.

The product of its digits is 54432, while the sum is 40.

The square root of 1673689 is about 1293.7113279244. The cubic root of 1673689 is about 118.7293947628.

The spelling of 1673689 in words is "one million, six hundred seventy-three thousand, six hundred eighty-nine".