643010113 has 4 divisors (see below), whose sum is σ = 643070128. Its totient is φ = 642950100.

The previous prime is 643010111. The next prime is 643010129. The reversal of 643010113 is 311010346.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 311010346 = 2 ⋅155505173.

It is a cyclic number.

It is not a de Polignac number, because 643010113 - 2¹ = 643010111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643010111) 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 3 ways as a sum of consecutive naturals, for example, 9063 + ... + 36988.

It is an arithmetic number, because the mean of its divisors is an integer number (160767532).

Almost surely, 2^643010113 is an apocalyptic number.

It is an amenable number.

643010113 is a deficient number, since it is larger than the sum of its proper divisors (60015).

643010113 is a wasteful number, since it uses less digits than its factorization.

643010113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60014.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 643010113 is about 25357.6440743220. The cubic root of 643010113 is about 863.1228241871.

Adding to 643010113 its reverse (311010346), we get a palindrome (954020459).

The spelling of 643010113 in words is "six hundred forty-three million, ten thousand, one hundred thirteen".