643159299 has 8 divisors (see below), whose sum is σ = 877488832. Its totient is φ = 418801320.

The previous prime is 643159289. The next prime is 643159313. The reversal of 643159299 is 992951346.

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

It is not a de Polignac number, because 643159299 - 2¹⁵ = 643126531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643159259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2492737 + ... + 2492994.

It is an arithmetic number, because the mean of its divisors is an integer number (109686104).

Almost surely, 2^643159299 is an apocalyptic number.

643159299 is a deficient number, since it is larger than the sum of its proper divisors (234329533).

643159299 is a wasteful number, since it uses less digits than its factorization.

643159299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985777.

The product of its digits is 524880, while the sum is 48.

The square root of 643159299 is about 25360.5855413474. The cubic root of 643159299 is about 863.1895706151.

The spelling of 643159299 in words is "six hundred forty-three million, one hundred fifty-nine thousand, two hundred ninety-nine".