639952203 has 8 divisors (see below), whose sum is σ = 930839616. Its totient is φ = 387849800.

The previous prime is 639952177. The next prime is 639952217. The reversal of 639952203 is 302259936.

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 639952203 - 2⁵ = 639952171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (639952223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9696213 + ... + 9696278.

It is an arithmetic number, because the mean of its divisors is an integer number (116354952).

Almost surely, 2^639952203 is an apocalyptic number.

639952203 is a deficient number, since it is larger than the sum of its proper divisors (290887413).

639952203 is a wasteful number, since it uses less digits than its factorization.

639952203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19392505.

The product of its (nonzero) digits is 87480, while the sum is 39.

The square root of 639952203 is about 25297.2765925504. The cubic root of 639952203 is about 861.7524222464.

The spelling of 639952203 in words is "six hundred thirty-nine million, nine hundred fifty-two thousand, two hundred three".