203423822309 has 2 divisors, whose sum is σ = 203423822310. Its totient is φ = 203423822308.

The previous prime is 203423822263. The next prime is 203423822323. The reversal of 203423822309 is 903228324302.

203423822309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190890348100 + 12533474209 = 436910^2 + 111953^2 .

It is a cyclic number.

It is not a de Polignac number, because 203423822309 - 2²⁸ = 203155386853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203423822339) 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 as a sum of consecutive naturals, namely, 101711911154 + 101711911155.

It is an arithmetic number, because the mean of its divisors is an integer number (101711911155).

Almost surely, 2^203423822309 is an apocalyptic number.

It is an amenable number.

203423822309 is a deficient number, since it is larger than the sum of its proper divisors (1).

203423822309 is an equidigital number, since it uses as much as digits as its factorization.

203423822309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 203423822309 in words is "two hundred three billion, four hundred twenty-three million, eight hundred twenty-two thousand, three hundred nine".