509749841 has 8 divisors (see below), whose sum is σ = 542112480. Its totient is φ = 477940608.

The previous prime is 509749831. The next prime is 509749853. The reversal of 509749841 is 148947905.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509749841 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (509749831) 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 7 ways as a sum of consecutive naturals, for example, 136451 + ... + 140136.

It is an arithmetic number, because the mean of its divisors is an integer number (67764060).

Almost surely, 2^509749841 is an apocalyptic number.

It is an amenable number.

509749841 is a deficient number, since it is larger than the sum of its proper divisors (32362639).

509749841 is a wasteful number, since it uses less digits than its factorization.

509749841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276703.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 509749841 is about 22577.6402885687. The cubic root of 509749841 is about 798.8263211269.

The spelling of 509749841 in words is "five hundred nine million, seven hundred forty-nine thousand, eight hundred forty-one".