1312403443 has 8 divisors (see below), whose sum is σ = 1427080928. Its totient is φ = 1199686464.

The previous prime is 1312403441. The next prime is 1312403453. The reversal of 1312403443 is 3443042131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312403443 - 2¹ = 1312403441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312403441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488730 + ... + 491407.

It is an arithmetic number, because the mean of its divisors is an integer number (178385116).

Almost surely, 2^1312403443 is an apocalyptic number.

1312403443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1312403443 is a deficient number, since it is larger than the sum of its proper divisors (114677485).

1312403443 is a wasteful number, since it uses less digits than its factorization.

1312403443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980253.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 1312403443 is about 36227.1092277593. The cubic root of 1312403443 is about 1094.8529352196.

Adding to 1312403443 its reverse (3443042131), we get a palindrome (4755445574).

The spelling of 1312403443 in words is "one billion, three hundred twelve million, four hundred three thousand, four hundred forty-three".