490607561 has 2 divisors, whose sum is σ = 490607562. Its totient is φ = 490607560.

The previous prime is 490607527. The next prime is 490607563. The reversal of 490607561 is 165706094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 407232400 + 83375161 = 20180^2 + 9131^2 .

It is a cyclic number.

It is not a de Polignac number, because 490607561 - 2⁶ = 490607497 is a prime.

Together with 490607563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (490607563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245303780 + 245303781.

It is an arithmetic number, because the mean of its divisors is an integer number (245303781).

Almost surely, 2^490607561 is an apocalyptic number.

It is an amenable number.

490607561 is a deficient number, since it is larger than the sum of its proper divisors (1).

490607561 is an equidigital number, since it uses as much as digits as its factorization.

490607561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 490607561 is about 22149.6627739566. The cubic root of 490607561 is about 788.6992218686.

The spelling of 490607561 in words is "four hundred ninety million, six hundred seven thousand, five hundred sixty-one".