490748689 has 2 divisors, whose sum is σ = 490748690. Its totient is φ = 490748688.

The previous prime is 490748683. The next prime is 490748729. The reversal of 490748689 is 986847094.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296425089 + 194323600 = 17217^2 + 13940^2 .

It is a cyclic number.

It is not a de Polignac number, because 490748689 - 2³ = 490748681 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (490748681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245374344 + 245374345.

It is an arithmetic number, because the mean of its divisors is an integer number (245374345).

Almost surely, 2^490748689 is an apocalyptic number.

It is an amenable number.

490748689 is a deficient number, since it is larger than the sum of its proper divisors (1).

490748689 is an equidigital number, since it uses as much as digits as its factorization.

490748689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 490748689 is about 22152.8483270211. The cubic root of 490748689 is about 788.7748402661.

The spelling of 490748689 in words is "four hundred ninety million, seven hundred forty-eight thousand, six hundred eighty-nine".