1890173 has 2 divisors, whose sum is σ = 1890174. Its totient is φ = 1890172.

The previous prime is 1890167. The next prime is 1890193. The reversal of 1890173 is 3710981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1315609 + 574564 = 1147^2 + 758^2 .

It is a cyclic number.

It is not a de Polignac number, because 1890173 - 2²⁰ = 841597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1890103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945086 + 945087.

It is an arithmetic number, because the mean of its divisors is an integer number (945087).

2^1890173 is an apocalyptic number.

It is an amenable number.

1890173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890173 is an equidigital number, since it uses as much as digits as its factorization.

1890173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1890173 is about 1374.8356265387. The cubic root of 1890173 is about 123.6423312726.

The spelling of 1890173 in words is "one million, eight hundred ninety thousand, one hundred seventy-three".