490020649 has 2 divisors, whose sum is σ = 490020650. Its totient is φ = 490020648.

The previous prime is 490020613. The next prime is 490020653. The reversal of 490020649 is 946020094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 406627225 + 83393424 = 20165^2 + 9132^2 .

It is a cyclic number.

It is not a de Polignac number, because 490020649 - 2⁷ = 490020521 is a prime.

It is not a weakly prime, because it can be changed into another prime (490000649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245010324 + 245010325.

It is an arithmetic number, because the mean of its divisors is an integer number (245010325).

Almost surely, 2^490020649 is an apocalyptic number.

It is an amenable number.

490020649 is a deficient number, since it is larger than the sum of its proper divisors (1).

490020649 is an equidigital number, since it uses as much as digits as its factorization.

490020649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 490020649 is about 22136.4100296322. The cubic root of 490020649 is about 788.3845903895.

The spelling of 490020649 in words is "four hundred ninety million, twenty thousand, six hundred forty-nine".