490139909 has 8 divisors (see below), whose sum is σ = 568050048. Its totient is φ = 414202320.

The previous prime is 490139899. The next prime is 490139911. The reversal of 490139909 is 909931094.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 490139909 - 2⁸ = 490139653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 490139909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490139939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492602 + ... + 493595.

It is an arithmetic number, because the mean of its divisors is an integer number (71006256).

Almost surely, 2^490139909 is an apocalyptic number.

It is an amenable number.

490139909 is a deficient number, since it is larger than the sum of its proper divisors (77910139).

490139909 is an equidigital number, since it uses as much as digits as its factorization.

490139909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986275.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 490139909 is about 22139.1036178071. The cubic root of 490139909 is about 788.4485435581.

The spelling of 490139909 in words is "four hundred ninety million, one hundred thirty-nine thousand, nine hundred nine".