203142109 has 2 divisors, whose sum is σ = 203142110. Its totient is φ = 203142108.

The previous prime is 203142103. The next prime is 203142119. The reversal of 203142109 is 901241302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180150084 + 22992025 = 13422^2 + 4795^2 .

It is a cyclic number.

It is not a de Polignac number, because 203142109 - 2¹¹ = 203140061 is a prime.

It is equal to p_11243290 and since 203142109 and 11243290 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203142109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203142103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101571054 + 101571055.

It is an arithmetic number, because the mean of its divisors is an integer number (101571055).

Almost surely, 2^203142109 is an apocalyptic number.

It is an amenable number.

203142109 is a deficient number, since it is larger than the sum of its proper divisors (1).

203142109 is an equidigital number, since it uses as much as digits as its factorization.

203142109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 203142109 is about 14252.7930245268. The cubic root of 203142109 is about 587.8501756659.

The spelling of 203142109 in words is "two hundred three million, one hundred forty-two thousand, one hundred nine".