203402123 has 2 divisors, whose sum is σ = 203402124. Its totient is φ = 203402122.

The previous prime is 203402077. The next prime is 203402141. The reversal of 203402123 is 321204302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 203402123 - 2¹⁶ = 203336587 is a prime.

It is not a weakly prime, because it can be changed into another prime (203402153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101701061 + 101701062.

It is an arithmetic number, because the mean of its divisors is an integer number (101701062).

Almost surely, 2^203402123 is an apocalyptic number.

203402123 is a deficient number, since it is larger than the sum of its proper divisors (1).

203402123 is an equidigital number, since it uses as much as digits as its factorization.

203402123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 203402123 is about 14261.9116180125. The cubic root of 203402123 is about 588.1008771887.

Adding to 203402123 its reverse (321204302), we get a palindrome (524606425).

The spelling of 203402123 in words is "two hundred three million, four hundred two thousand, one hundred twenty-three".