490487189 has 2 divisors, whose sum is σ = 490487190. Its totient is φ = 490487188.

The previous prime is 490487171. The next prime is 490487201. The reversal of 490487189 is 981784094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 468939025 + 21548164 = 21655^2 + 4642^2 .

It is a cyclic number.

It is not a de Polignac number, because 490487189 - 2¹² = 490483093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (490487149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245243594 + 245243595.

It is an arithmetic number, because the mean of its divisors is an integer number (245243595).

Almost surely, 2^490487189 is an apocalyptic number.

It is an amenable number.

490487189 is a deficient number, since it is larger than the sum of its proper divisors (1).

490487189 is an equidigital number, since it uses as much as digits as its factorization.

490487189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 490487189 is about 22146.9453649933. The cubic root of 490487189 is about 788.6347133723.

The spelling of 490487189 in words is "four hundred ninety million, four hundred eighty-seven thousand, one hundred eighty-nine".