490609081 has 2 divisors, whose sum is σ = 490609082. Its totient is φ = 490609080.

The previous prime is 490609061. The next prime is 490609087. The reversal of 490609081 is 180906094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 476985600 + 13623481 = 21840^2 + 3691^2 .

It is a cyclic number.

It is not a de Polignac number, because 490609081 - 2²¹ = 488511929 is a prime.

It is a super-2 number, since 2×490609081² = 481394540719329122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 490609081.

It is not a weakly prime, because it can be changed into another prime (490609087) 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, 245304540 + 245304541.

It is an arithmetic number, because the mean of its divisors is an integer number (245304541).

Almost surely, 2^490609081 is an apocalyptic number.

It is an amenable number.

490609081 is a deficient number, since it is larger than the sum of its proper divisors (1).

490609081 is an equidigital number, since it uses as much as digits as its factorization.

490609081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 490609081 is about 22149.6970859649. The cubic root of 490609081 is about 788.7000363836.

The spelling of 490609081 in words is "four hundred ninety million, six hundred nine thousand, eighty-one".