1312203443 has 4 divisors (see below), whose sum is σ = 1319788608. Its totient is φ = 1304618280.

The previous prime is 1312203419. The next prime is 1312203467. The reversal of 1312203443 is 3443022131.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1312203419) and next prime (1312203467).

It is a cyclic number.

It is not a de Polignac number, because 1312203443 - 2⁶ = 1312203379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312203493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3792323 + ... + 3792668.

It is an arithmetic number, because the mean of its divisors is an integer number (329947152).

Almost surely, 2^1312203443 is an apocalyptic number.

1312203443 is a deficient number, since it is larger than the sum of its proper divisors (7585165).

1312203443 is an equidigital number, since it uses as much as digits as its factorization.

1312203443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7585164.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1312203443 is about 36224.3487588114. The cubic root of 1312203443 is about 1094.7973167251.

Adding to 1312203443 its reverse (3443022131), we get a palindrome (4755225574).

The spelling of 1312203443 in words is "one billion, three hundred twelve million, two hundred three thousand, four hundred forty-three".