643013002 has 8 divisors (see below), whose sum is σ = 964829700. Its totient is φ = 321403104.

The previous prime is 643012999. The next prime is 643013039. The reversal of 643013002 is 200310346.

It can be written as a sum of positive squares in 2 ways, for example, as 630060201 + 12952801 = 25101^2 + 3599^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43677 + ... + 56512.

Almost surely, 2^643013002 is an apocalyptic number.

643013002 is a deficient number, since it is larger than the sum of its proper divisors (321816698).

643013002 is a wasteful number, since it uses less digits than its factorization.

643013002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103400.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 643013002 is about 25357.7010393293. The cubic root of 643013002 is about 863.1241168356.

Adding to 643013002 its reverse (200310346), we get a palindrome (843323348).

The spelling of 643013002 in words is "six hundred forty-three million, thirteen thousand, two".