200239861 has 2 divisors, whose sum is σ = 200239862. Its totient is φ = 200239860.

The previous prime is 200239849. The next prime is 200239877. The reversal of 200239861 is 168932002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102111025 + 98128836 = 10105^2 + 9906^2 .

It is a cyclic number.

It is not a de Polignac number, because 200239861 - 2⁷ = 200239733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200239801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100119930 + 100119931.

It is an arithmetic number, because the mean of its divisors is an integer number (100119931).

Almost surely, 2^200239861 is an apocalyptic number.

It is an amenable number.

200239861 is a deficient number, since it is larger than the sum of its proper divisors (1).

200239861 is an equidigital number, since it uses as much as digits as its factorization.

200239861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 200239861 is about 14150.6134496000. The cubic root of 200239861 is about 585.0372401841.

The spelling of 200239861 in words is "two hundred million, two hundred thirty-nine thousand, eight hundred sixty-one".