1312203143 has 2 divisors, whose sum is σ = 1312203144. Its totient is φ = 1312203142.

The previous prime is 1312203131. The next prime is 1312203161. The reversal of 1312203143 is 3413022131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312203143 - 2⁸ = 1312202887 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312203163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656101571 + 656101572.

It is an arithmetic number, because the mean of its divisors is an integer number (656101572).

Almost surely, 2^1312203143 is an apocalyptic number.

1312203143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312203143 is an equidigital number, since it uses as much as digits as its factorization.

1312203143 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 20.

The square root of 1312203143 is about 36224.3446179500. The cubic root of 1312203143 is about 1094.7972332931.

Adding to 1312203143 its reverse (3413022131), we get a palindrome (4725225274).

The spelling of 1312203143 in words is "one billion, three hundred twelve million, two hundred three thousand, one hundred forty-three".