2090405189 has 4 divisors (see below), whose sum is σ = 2091182400. Its totient is φ = 2089627980.

The previous prime is 2090405183. The next prime is 2090405249. The reversal of 2090405189 is 9815040902.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9815040902 = 2 ⋅4907520451.

It is a cyclic number.

It is not a de Polignac number, because 2090405189 - 2²⁴ = 2073627973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2090405183) 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, 384557 + ... + 389954.

It is an arithmetic number, because the mean of its divisors is an integer number (522795600).

Almost surely, 2^2090405189 is an apocalyptic number.

It is an amenable number.

2090405189 is a deficient number, since it is larger than the sum of its proper divisors (777211).

2090405189 is an equidigital number, since it uses as much as digits as its factorization.

2090405189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777210.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 2090405189 is about 45720.9491261938. The cubic root of 2090405189 is about 1278.6258831620.

The spelling of 2090405189 in words is "two billion, ninety million, four hundred five thousand, one hundred eighty-nine".