491587473 has 16 divisors (see below), whose sum is σ = 706844096. Its totient is φ = 302097600.

The previous prime is 491587463. The next prime is 491587477. The reversal of 491587473 is 374785194.

It is a happy number.

It is not a de Polignac number, because 491587473 - 2¹⁴ = 491571089 is a prime.

It is a super-2 number, since 2×491587473² = 483316487221051458, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (491587477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21198 + ... + 37848.

It is an arithmetic number, because the mean of its divisors is an integer number (44177756).

Almost surely, 2^491587473 is an apocalyptic number.

It is an amenable number.

491587473 is a deficient number, since it is larger than the sum of its proper divisors (215256623).

491587473 is a wasteful number, since it uses less digits than its factorization.

491587473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17424.

The product of its digits is 846720, while the sum is 48.

The square root of 491587473 is about 22171.7719860186. The cubic root of 491587473 is about 789.2239738364.

The spelling of 491587473 in words is "four hundred ninety-one million, five hundred eighty-seven thousand, four hundred seventy-three".