203142397 has 2 divisors, whose sum is σ = 203142398. Its totient is φ = 203142396.

The previous prime is 203142337. The next prime is 203142403. The reversal of 203142397 is 793241302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202037796 + 1104601 = 14214^2 + 1051^2 .

It is a cyclic number.

It is not a de Polignac number, because 203142397 - 2¹¹ = 203140349 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203142337) 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, 101571198 + 101571199.

It is an arithmetic number, because the mean of its divisors is an integer number (101571199).

Almost surely, 2^203142397 is an apocalyptic number.

It is an amenable number.

203142397 is a deficient number, since it is larger than the sum of its proper divisors (1).

203142397 is an equidigital number, since it uses as much as digits as its factorization.

203142397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 203142397 is about 14252.8031278061. The cubic root of 203142397 is about 587.8504534694.

Adding to 203142397 its reverse (793241302), we get a palindrome (996383699).

The spelling of 203142397 in words is "two hundred three million, one hundred forty-two thousand, three hundred ninety-seven".