490563491 has 4 divisors (see below), whose sum is σ = 535160184. Its totient is φ = 445966800.

The previous prime is 490563473. The next prime is 490563497. The reversal of 490563491 is 194365094.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 490563491 - 2¹⁰ = 490562467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (490563497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22298330 + ... + 22298351.

It is an arithmetic number, because the mean of its divisors is an integer number (133790046).

Almost surely, 2^490563491 is an apocalyptic number.

490563491 is a deficient number, since it is larger than the sum of its proper divisors (44596693).

490563491 is a wasteful number, since it uses less digits than its factorization.

490563491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44596692.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 490563491 is about 22148.6679283428. The cubic root of 490563491 is about 788.6756055622.

The spelling of 490563491 in words is "four hundred ninety million, five hundred sixty-three thousand, four hundred ninety-one".