1090189 has 2 divisors, whose sum is σ = 1090190. Its totient is φ = 1090188.

The previous prime is 1090181. The next prime is 1090211. The reversal of 1090189 is 9810901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 736164 + 354025 = 858^2 + 595^2 .

It is an emirp because it is prime and its reverse (9810901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1090189 - 2³ = 1090181 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1090181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545094 + 545095.

It is an arithmetic number, because the mean of its divisors is an integer number (545095).

2^1090189 is an apocalyptic number.

It is an amenable number.

1090189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1090189 is an equidigital number, since it uses as much as digits as its factorization.

1090189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1090189 is about 1044.1211615517. The cubic root of 1090189 is about 102.9201945680.

The spelling of 1090189 in words is "one million, ninety thousand, one hundred eighty-nine".