206104439 has 4 divisors (see below), whose sum is σ = 209993256. Its totient is φ = 202215624.

The previous prime is 206104391. The next prime is 206104441. The reversal of 206104439 is 934401602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934401602 = 2 ⋅467200801.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206104439 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 (206104139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1944329 + ... + 1944434.

It is an arithmetic number, because the mean of its divisors is an integer number (52498314).

Almost surely, 2^206104439 is an apocalyptic number.

206104439 is a deficient number, since it is larger than the sum of its proper divisors (3888817).

206104439 is an equidigital number, since it uses as much as digits as its factorization.

206104439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888816.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 206104439 is about 14356.3379383463. The cubic root of 206104439 is about 590.6938490291.

The spelling of 206104439 in words is "two hundred six million, one hundred four thousand, four hundred thirty-nine".