1673381 has 2 divisors, whose sum is σ = 1673382. Its totient is φ = 1673380.

The previous prime is 1673377. The next prime is 1673389. The reversal of 1673381 is 1833761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 872356 + 801025 = 934^2 + 895^2 .

It is an emirp because it is prime and its reverse (1833761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1673381 - 2² = 1673377 is a prime.

It is a super-2 number, since 2×1673381² = 5600407942322, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1673389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836690 + 836691.

It is an arithmetic number, because the mean of its divisors is an integer number (836691).

2^1673381 is an apocalyptic number.

It is an amenable number.

1673381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1673381 is an equidigital number, since it uses as much as digits as its factorization.

1673381 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1673381 is about 1293.5922850729. The cubic root of 1673381 is about 118.7221112716.

The spelling of 1673381 in words is "one million, six hundred seventy-three thousand, three hundred eighty-one".