490724681 has 2 divisors, whose sum is σ = 490724682. Its totient is φ = 490724680.

The previous prime is 490724671. The next prime is 490724719. The reversal of 490724681 is 186427094.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 371718400 + 119006281 = 19280^2 + 10909^2 .

It is a cyclic number.

It is not a de Polignac number, because 490724681 - 2⁶ = 490724617 is a prime.

It is a super-2 number, since 2×490724681² = 481621425085103522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (490724621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245362340 + 245362341.

It is an arithmetic number, because the mean of its divisors is an integer number (245362341).

Almost surely, 2^490724681 is an apocalyptic number.

It is an amenable number.

490724681 is a deficient number, since it is larger than the sum of its proper divisors (1).

490724681 is an equidigital number, since it uses as much as digits as its factorization.

490724681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 490724681 is about 22152.3064487651. The cubic root of 490724681 is about 788.7619774603.

The spelling of 490724681 in words is "four hundred ninety million, seven hundred twenty-four thousand, six hundred eighty-one".