200172639 has 8 divisors (see below), whose sum is σ = 268534912. Its totient is φ = 132629400.

The previous prime is 200172631. The next prime is 200172647. The reversal of 200172639 is 936271002.

It is an interprime number because it is at equal distance from previous prime (200172631) and next prime (200172647).

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

It is not a de Polignac number, because 200172639 - 2³ = 200172631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200172631) 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, 204187 + ... + 205164.

It is an arithmetic number, because the mean of its divisors is an integer number (33566864).

Almost surely, 2^200172639 is an apocalyptic number.

200172639 is a deficient number, since it is larger than the sum of its proper divisors (68362273).

200172639 is a wasteful number, since it uses less digits than its factorization.

200172639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409517.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 200172639 is about 14148.2380175059. The cubic root of 200172639 is about 584.9717657496.

The spelling of 200172639 in words is "two hundred million, one hundred seventy-two thousand, six hundred thirty-nine".