204162439 has 4 divisors (see below), whose sum is σ = 219867256. Its totient is φ = 188457624.

The previous prime is 204162437. The next prime is 204162443. The reversal of 204162439 is 934261402.

It is a happy number.

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 204162439 - 2¹ = 204162437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204162439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204162437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7852389 + ... + 7852414.

It is an arithmetic number, because the mean of its divisors is an integer number (54966814).

Almost surely, 2^204162439 is an apocalyptic number.

204162439 is a deficient number, since it is larger than the sum of its proper divisors (15704817).

204162439 is a wasteful number, since it uses less digits than its factorization.

204162439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15704816.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 204162439 is about 14288.5422279531. The cubic root of 204162439 is about 588.8327386451.

The spelling of 204162439 in words is "two hundred four million, one hundred sixty-two thousand, four hundred thirty-nine".