490444189 has 2 divisors, whose sum is σ = 490444190. Its totient is φ = 490444188.

The previous prime is 490444187. The next prime is 490444267. The reversal of 490444189 is 981444094.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290702500 + 199741689 = 17050^2 + 14133^2 .

It is a cyclic number.

It is not a de Polignac number, because 490444189 - 2¹ = 490444187 is a prime.

Together with 490444187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (490444181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245222094 + 245222095.

It is an arithmetic number, because the mean of its divisors is an integer number (245222095).

Almost surely, 2^490444189 is an apocalyptic number.

It is an amenable number.

490444189 is a deficient number, since it is larger than the sum of its proper divisors (1).

490444189 is an equidigital number, since it uses as much as digits as its factorization.

490444189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 490444189 is about 22145.9745552098. The cubic root of 490444189 is about 788.6116667060.

The spelling of 490444189 in words is "four hundred ninety million, four hundred forty-four thousand, one hundred eighty-nine".