204126739 has 4 divisors (see below), whose sum is σ = 206108656. Its totient is φ = 202144824.

The previous prime is 204126721. The next prime is 204126773. The reversal of 204126739 is 937621402.

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 204126739 - 2¹³ = 204118547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204126239) 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, 990804 + ... + 991009.

It is an arithmetic number, because the mean of its divisors is an integer number (51527164).

Almost surely, 2^204126739 is an apocalyptic number.

204126739 is a deficient number, since it is larger than the sum of its proper divisors (1981917).

204126739 is a wasteful number, since it uses less digits than its factorization.

204126739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981916.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 204126739 is about 14287.2929206341. The cubic root of 204126739 is about 588.7984153969.

The spelling of 204126739 in words is "two hundred four million, one hundred twenty-six thousand, seven hundred thirty-nine".