491236473 has 32 divisors (see below), whose sum is σ = 808493056. Its totient is φ = 258355008.

The previous prime is 491236391. The next prime is 491236511. The reversal of 491236473 is 374632194.

It is not a de Polignac number, because 491236473 - 2⁸ = 491236217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (491236073) 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 31 ways as a sum of consecutive naturals, for example, 97740 + ... + 102642.

It is an arithmetic number, because the mean of its divisors is an integer number (25265408).

Almost surely, 2^491236473 is an apocalyptic number.

It is an amenable number.

491236473 is a deficient number, since it is larger than the sum of its proper divisors (317256583).

491236473 is a wasteful number, since it uses less digits than its factorization.

491236473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5293.

The product of its digits is 108864, while the sum is 39.

The square root of 491236473 is about 22163.8551023959. The cubic root of 491236473 is about 789.0360903043.

The spelling of 491236473 in words is "four hundred ninety-one million, two hundred thirty-six thousand, four hundred seventy-three".