204774139 has 8 divisors (see below), whose sum is σ = 210593520. Its totient is φ = 199027296.

The previous prime is 204774121. The next prime is 204774149. The reversal of 204774139 is 931477402.

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

It is not a de Polignac number, because 204774139 - 2⁵ = 204774107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204774098 and 204774107.

It is not an unprimeable number, because it can be changed into a prime (204774109) 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, 12384 + ... + 23725.

It is an arithmetic number, because the mean of its divisors is an integer number (26324190).

Almost surely, 2^204774139 is an apocalyptic number.

204774139 is a deficient number, since it is larger than the sum of its proper divisors (5819381).

204774139 is a wasteful number, since it uses less digits than its factorization.

204774139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36269.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 204774139 is about 14309.9314813174. The cubic root of 204774139 is about 589.4202281291.

The spelling of 204774139 in words is "two hundred four million, seven hundred seventy-four thousand, one hundred thirty-nine".