490307789 has 2 divisors, whose sum is σ = 490307790. Its totient is φ = 490307788.

The previous prime is 490307773. The next prime is 490307803. The reversal of 490307789 is 987703094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 411684100 + 78623689 = 20290^2 + 8867^2 .

It is a cyclic number.

It is not a de Polignac number, because 490307789 - 2⁴ = 490307773 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (490307189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245153894 + 245153895.

It is an arithmetic number, because the mean of its divisors is an integer number (245153895).

Almost surely, 2^490307789 is an apocalyptic number.

It is an amenable number.

490307789 is a deficient number, since it is larger than the sum of its proper divisors (1).

490307789 is an equidigital number, since it uses as much as digits as its factorization.

490307789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 490307789 is about 22142.8947746224. The cubic root of 490307789 is about 788.5385516216.

The spelling of 490307789 in words is "four hundred ninety million, three hundred seven thousand, seven hundred eighty-nine".