490461989 has 2 divisors, whose sum is σ = 490461990. Its totient is φ = 490461988.

The previous prime is 490461929. The next prime is 490462003. The reversal of 490461989 is 989164094.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 315772900 + 174689089 = 17770^2 + 13217^2 .

It is a cyclic number.

It is not a de Polignac number, because 490461989 - 2⁸ = 490461733 is a prime.

It is a super-2 number, since 2×490461989² = 481105925307672242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (490461929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245230994 + 245230995.

It is an arithmetic number, because the mean of its divisors is an integer number (245230995).

Almost surely, 2^490461989 is an apocalyptic number.

It is an amenable number.

490461989 is a deficient number, since it is larger than the sum of its proper divisors (1).

490461989 is an equidigital number, since it uses as much as digits as its factorization.

490461989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 490461989 is about 22146.3764304683. The cubic root of 490461989 is about 788.6212071173.

The spelling of 490461989 in words is "four hundred ninety million, four hundred sixty-one thousand, nine hundred eighty-nine".