491284603 has 4 divisors (see below), whose sum is σ = 494870760. Its totient is φ = 487698448.

The previous prime is 491284579. The next prime is 491284637. The reversal of 491284603 is 306482194.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 306482194 = 2 ⋅153241097.

It is a cyclic number.

It is not a de Polignac number, because 491284603 - 2²¹ = 489187451 is a prime.

It is a super-2 number, since 2×491284603² = 482721122289735218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491284303) 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, 1792873 + ... + 1793146.

It is an arithmetic number, because the mean of its divisors is an integer number (123717690).

Almost surely, 2^491284603 is an apocalyptic number.

491284603 is a deficient number, since it is larger than the sum of its proper divisors (3586157).

491284603 is a wasteful number, since it uses less digits than its factorization.

491284603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3586156.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 491284603 is about 22164.9408526168. The cubic root of 491284603 is about 789.0618586588.

The spelling of 491284603 in words is "four hundred ninety-one million, two hundred eighty-four thousand, six hundred three".