200840639 has 4 divisors (see below), whose sum is σ = 200872056. Its totient is φ = 200809224.

The previous prime is 200840597. The next prime is 200840657. The reversal of 200840639 is 936048002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 200840639 - 2¹² = 200836543 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 (200843639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2309 + ... + 20174.

It is an arithmetic number, because the mean of its divisors is an integer number (50218014).

Almost surely, 2^200840639 is an apocalyptic number.

200840639 is a deficient number, since it is larger than the sum of its proper divisors (31417).

200840639 is an equidigital number, since it uses as much as digits as its factorization.

200840639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31416.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 200840639 is about 14171.8255351948. The cubic root of 200840639 is about 585.6217501387.

The spelling of 200840639 in words is "two hundred million, eight hundred forty thousand, six hundred thirty-nine".