490643 has 2 divisors, whose sum is σ = 490644. Its totient is φ = 490642.

The previous prime is 490631. The next prime is 490661. The reversal of 490643 is 346094.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 490643 - 2⁴ = 490627 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (490663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245321 + 245322.

It is an arithmetic number, because the mean of its divisors is an integer number (245322).

2⁴⁹⁰⁶⁴³ is an apocalyptic number.

490643 is a deficient number, since it is larger than the sum of its proper divisors (1).

490643 is an equidigital number, since it uses as much as digits as its factorization.

490643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 490643 is about 700.4591351392. The cubic root of 490643 is about 78.8718211954.

The spelling of 490643 in words is "four hundred ninety thousand, six hundred forty-three".