204123803 has 4 divisors (see below), whose sum is σ = 219825648. Its totient is φ = 188421960.

The previous prime is 204123797. The next prime is 204123817. The reversal of 204123803 is 308321402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 308321402 = 2 ⋅154160701.

It is a cyclic number.

It is not a de Polignac number, because 204123803 - 2¹⁴ = 204107419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204123823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7850903 + ... + 7850928.

It is an arithmetic number, because the mean of its divisors is an integer number (54956412).

Almost surely, 2^204123803 is an apocalyptic number.

204123803 is a deficient number, since it is larger than the sum of its proper divisors (15701845).

204123803 is a wasteful number, since it uses less digits than its factorization.

204123803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15701844.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 204123803 is about 14287.1901716188. The cubic root of 204123803 is about 588.7955924442.

The spelling of 204123803 in words is "two hundred four million, one hundred twenty-three thousand, eight hundred three".