491917733 has 6 divisors (see below), whose sum is σ = 519171174. Its totient is φ = 466026984.

The previous prime is 491917711. The next prime is 491917759. The reversal of 491917733 is 337719194.

It can be written as a sum of positive squares in only one way, i.e., 331312804 + 160604929 = 18202^2 + 12673^2 .

It is not a de Polignac number, because 491917733 - 2⁶ = 491917669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491917793) 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 5 ways as a sum of consecutive naturals, for example, 680966 + ... + 681687.

It is an arithmetic number, because the mean of its divisors is an integer number (86528529).

Almost surely, 2^491917733 is an apocalyptic number.

It is an amenable number.

491917733 is a deficient number, since it is larger than the sum of its proper divisors (27253441).

491917733 is a wasteful number, since it uses less digits than its factorization.

491917733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362691 (or 1362672 counting only the distinct ones).

The product of its digits is 142884, while the sum is 44.

The square root of 491917733 is about 22179.2184938965. The cubic root of 491917733 is about 789.4006740005.

The spelling of 491917733 in words is "four hundred ninety-one million, nine hundred seventeen thousand, seven hundred thirty-three".