490898665 has 4 divisors (see below), whose sum is σ = 589078404. Its totient is φ = 392718928.

The previous prime is 490898663. The next prime is 490898669. The reversal of 490898665 is 566898094.

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

It can be written as a sum of positive squares in 2 ways, for example, as 72777961 + 418120704 = 8531^2 + 20448^2 .

It is a cyclic number.

It is not a de Polignac number, because 490898665 - 2¹ = 490898663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (490898663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49089862 + ... + 49089871.

It is an arithmetic number, because the mean of its divisors is an integer number (147269601).

Almost surely, 2^490898665 is an apocalyptic number.

It is an amenable number.

490898665 is a deficient number, since it is larger than the sum of its proper divisors (98179739).

490898665 is an equidigital number, since it uses as much as digits as its factorization.

490898665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98179738.

The product of its (nonzero) digits is 3732480, while the sum is 55.

The square root of 490898665 is about 22156.2330959033. The cubic root of 490898665 is about 788.8551836607.

The spelling of 490898665 in words is "four hundred ninety million, eight hundred ninety-eight thousand, six hundred sixty-five".