203142403 has 2 divisors, whose sum is σ = 203142404. Its totient is φ = 203142402.

The previous prime is 203142397. The next prime is 203142427. The reversal of 203142403 is 304241302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203142403 is a prime.

It is a super-2 number, since 2×203142403² = 82533671793228818, which contains 22 as substring.

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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101571201 + 101571202.

It is an arithmetic number, because the mean of its divisors is an integer number (101571202).

Almost surely, 2^203142403 is an apocalyptic number.

203142403 is a deficient number, since it is larger than the sum of its proper divisors (1).

203142403 is an equidigital number, since it uses as much as digits as its factorization.

203142403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 203142403 is about 14252.8033382910. The cubic root of 203142403 is about 587.8504592570.

Adding to 203142403 its reverse (304241302), we get a palindrome (507383705).

The spelling of 203142403 in words is "two hundred three million, one hundred forty-two thousand, four hundred three".