643201013 has 8 divisors (see below), whose sum is σ = 791632128. Its totient is φ = 508906224.

The previous prime is 643200991. The next prime is 643201021. The reversal of 643201013 is 310102346.

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

It is a cyclic number.

It is not a de Polignac number, because 643201013 - 2⁸ = 643200757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643201033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3533981 + ... + 3534162.

It is an arithmetic number, because the mean of its divisors is an integer number (98954016).

Almost surely, 2^643201013 is an apocalyptic number.

It is an amenable number.

643201013 is a deficient number, since it is larger than the sum of its proper divisors (148431115).

643201013 is a wasteful number, since it uses less digits than its factorization.

643201013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7068163.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 643201013 is about 25361.4079459323. The cubic root of 643201013 is about 863.2082317831.

Adding to 643201013 its reverse (310102346), we get a palindrome (953303359).

The spelling of 643201013 in words is "six hundred forty-three million, two hundred one thousand, thirteen".