204416123 has 4 divisors (see below), whose sum is σ = 204504288. Its totient is φ = 204327960.

The previous prime is 204416089. The next prime is 204416131. The reversal of 204416123 is 321614402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321614402 = 2 ⋅160807201.

It is a cyclic number.

It is not a de Polignac number, because 204416123 - 2²⁰ = 203367547 is a prime.

It is a super-2 number, since 2×204416123² = 83571902684702258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204416423) 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, 40508 + ... + 45273.

It is an arithmetic number, because the mean of its divisors is an integer number (51126072).

Almost surely, 2^204416123 is an apocalyptic number.

204416123 is a deficient number, since it is larger than the sum of its proper divisors (88165).

204416123 is an equidigital number, since it uses as much as digits as its factorization.

204416123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88164.

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

The square root of 204416123 is about 14297.4166547667. The cubic root of 204416123 is about 589.0765242923.

The spelling of 204416123 in words is "two hundred four million, four hundred sixteen thousand, one hundred twenty-three".