1381673 has 4 divisors (see below), whose sum is σ = 1384080. Its totient is φ = 1379268.

The previous prime is 1381649. The next prime is 1381693. The reversal of 1381673 is 3761831.

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 1381673 - 2⁶ = 1381609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1381613) 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, 218 + ... + 1676.

It is an arithmetic number, because the mean of its divisors is an integer number (346020).

2^1381673 is an apocalyptic number.

It is an amenable number.

1381673 is a deficient number, since it is larger than the sum of its proper divisors (2407).

1381673 is an equidigital number, since it uses as much as digits as its factorization.

1381673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406.

The product of its digits is 3024, while the sum is 29.

The square root of 1381673 is about 1175.4458728500. The cubic root of 1381673 is about 111.3786006017.

The spelling of 1381673 in words is "one million, three hundred eighty-one thousand, six hundred seventy-three".