490591 has 2 divisors, whose sum is σ = 490592. Its totient is φ = 490590.

The previous prime is 490579. The next prime is 490619. The reversal of 490591 is 195094.

It is an a-pointer prime, because the next prime (490619) can be obtained adding 490591 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 490591 - 2⁵ = 490559 is a prime.

490591 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (490541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245295 + 245296.

It is an arithmetic number, because the mean of its divisors is an integer number (245296).

2⁴⁹⁰⁵⁹¹ is an apocalyptic number.

490591 is a deficient number, since it is larger than the sum of its proper divisors (1).

490591 is an equidigital number, since it uses as much as digits as its factorization.

490591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 490591 is about 700.4220156449. The cubic root of 490591 is about 78.8690347298.

It can be divided in two parts, 490 and 591, that added together give a triangular number (1081 = T₄₆).

The spelling of 490591 in words is "four hundred ninety thousand, five hundred ninety-one".