204356139 has 8 divisors (see below), whose sum is σ = 293434512. Its totient is φ = 125757600.

The previous prime is 204356137. The next prime is 204356149. The reversal of 204356139 is 931653402.

204356139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 204356139 - 2¹ = 204356137 is a prime.

It is a super-2 number, since 2×204356139² = 83522863093974642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204356137) 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, 2619912 + ... + 2619989.

It is an arithmetic number, because the mean of its divisors is an integer number (36679314).

Almost surely, 2^204356139 is an apocalyptic number.

204356139 is a deficient number, since it is larger than the sum of its proper divisors (89078373).

204356139 is a wasteful number, since it uses less digits than its factorization.

204356139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5239917.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 204356139 is about 14295.3187792368. The cubic root of 204356139 is about 589.0188989894.

The spelling of 204356139 in words is "two hundred four million, three hundred fifty-six thousand, one hundred thirty-nine".