513683641 has 6 divisors (see below), whose sum is σ = 532008542. Its totient is φ = 495969600.

The previous prime is 513683627. The next prime is 513683647. The reversal of 513683641 is 146386315.

It can be written as a sum of positive squares in 3 ways, for example, as 237160000 + 276523641 = 15400^2 + 16629^2 .

It is not a de Polignac number, because 513683641 - 2²¹ = 511586489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 513683641.

It is not an unprimeable number, because it can be changed into a prime (513683647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 304560 + ... + 306241.

Almost surely, 2^513683641 is an apocalyptic number.

It is an amenable number.

513683641 is a deficient number, since it is larger than the sum of its proper divisors (18324901).

513683641 is an equidigital number, since it uses as much as digits as its factorization.

513683641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610859 (or 610830 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 513683641 is about 22664.5900249707. The cubic root of 513683641 is about 800.8759369223.

The spelling of 513683641 in words is "five hundred thirteen million, six hundred eighty-three thousand, six hundred forty-one".