490085609 has 8 divisors (see below), whose sum is σ = 542049480. Its totient is φ = 440159616.

The previous prime is 490085597. The next prime is 490085621. The reversal of 490085609 is 906580094.

It is an interprime number because it is at equal distance from previous prime (490085597) and next prime (490085621).

It can be written as a sum of positive squares in 4 ways, for example, as 14845609 + 475240000 = 3853^2 + 21800^2 .

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

It is not a de Polignac number, because 490085609 - 2²⁰ = 489037033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (490085689) 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, 508964 + ... + 509925.

It is an arithmetic number, because the mean of its divisors is an integer number (67756185).

Almost surely, 2^490085609 is an apocalyptic number.

It is an amenable number.

490085609 is a deficient number, since it is larger than the sum of its proper divisors (51963871).

490085609 is a wasteful number, since it uses less digits than its factorization.

490085609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018939.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 490085609 is about 22137.8772469268. The cubic root of 490085609 is about 788.4194264726.

It can be divided in two parts, 4900 and 85609, that added together give a palindrome (90509).

The spelling of 490085609 in words is "four hundred ninety million, eighty-five thousand, six hundred nine".