643372103 has 8 divisors (see below), whose sum is σ = 702308880. Its totient is φ = 584510080.

The previous prime is 643372087. The next prime is 643372117. The reversal of 643372103 is 301273346.

It is a happy number.

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

It is not a de Polignac number, because 643372103 - 2⁴ = 643372087 is a prime.

It is a super-4 number, since 4×643372103⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643372183) 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 7 ways as a sum of consecutive naturals, for example, 143 + ... + 35871.

It is an arithmetic number, because the mean of its divisors is an integer number (87788610).

Almost surely, 2^643372103 is an apocalyptic number.

643372103 is a deficient number, since it is larger than the sum of its proper divisors (58936777).

643372103 is a wasteful number, since it uses less digits than its factorization.

643372103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37377.

The product of its (nonzero) digits is 9072, while the sum is 29.

The square root of 643372103 is about 25364.7807599435. The cubic root of 643372103 is about 863.2847621371.

The spelling of 643372103 in words is "six hundred forty-three million, three hundred seventy-two thousand, one hundred three".