491850239 has 16 divisors (see below), whose sum is σ = 545605632. Its totient is φ = 441015168.

The previous prime is 491850209. The next prime is 491850277. The reversal of 491850239 is 932058194.

It is a cyclic number.

It is not a de Polignac number, because 491850239 - 2²⁴ = 475073023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491850196 and 491850205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491850209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100442 + ... + 105224.

It is an arithmetic number, because the mean of its divisors is an integer number (34100352).

Almost surely, 2^491850239 is an apocalyptic number.

491850239 is a deficient number, since it is larger than the sum of its proper divisors (53755393).

491850239 is a wasteful number, since it uses less digits than its factorization.

491850239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086.

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

The square root of 491850239 is about 22177.6968822283. The cubic root of 491850239 is about 789.3645688807.

The spelling of 491850239 in words is "four hundred ninety-one million, eight hundred fifty thousand, two hundred thirty-nine".