643625003 has 16 divisors (see below), whose sum is σ = 752716800. Its totient is φ = 538866816.

The previous prime is 643624999. The next prime is 643625023. The reversal of 643625003 is 300526346.

643625003 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 643625003 - 2² = 643624999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643625023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193448 + ... + 196746.

It is an arithmetic number, because the mean of its divisors is an integer number (47044800).

Almost surely, 2^643625003 is an apocalyptic number.

643625003 is a deficient number, since it is larger than the sum of its proper divisors (109091797).

643625003 is a wasteful number, since it uses less digits than its factorization.

643625003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3946.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 643625003 is about 25369.7655290702. The cubic root of 643625003 is about 863.3978621171.

The spelling of 643625003 in words is "six hundred forty-three million, six hundred twenty-five thousand, three".