204861427 has 4 divisors (see below), whose sum is σ = 204895800. Its totient is φ = 204827056.

The previous prime is 204861421. The next prime is 204861463. The reversal of 204861427 is 724168402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724168402 = 2 ⋅362084201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204861427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204861392 and 204861401.

It is not an unprimeable number, because it can be changed into a prime (204861421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5677 + ... + 21022.

It is an arithmetic number, because the mean of its divisors is an integer number (51223950).

Almost surely, 2^204861427 is an apocalyptic number.

204861427 is a deficient number, since it is larger than the sum of its proper divisors (34373).

204861427 is an equidigital number, since it uses as much as digits as its factorization.

204861427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34372.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 204861427 is about 14312.9810661511. The cubic root of 204861427 is about 589.5039659235.

The spelling of 204861427 in words is "two hundred four million, eight hundred sixty-one thousand, four hundred twenty-seven".