1312433403 has 4 divisors (see below), whose sum is σ = 1749911208. Its totient is φ = 874955600.

The previous prime is 1312433393. The next prime is 1312433443. The reversal of 1312433403 is 3043342131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3043342131 = 3 ⋅1014447377.

It is a cyclic number.

It is not a de Polignac number, because 1312433403 - 2⁴ = 1312433387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312433443) 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 in 3 ways as a sum of consecutive naturals, for example, 218738898 + ... + 218738903.

It is an arithmetic number, because the mean of its divisors is an integer number (437477802).

Almost surely, 2^1312433403 is an apocalyptic number.

1312433403 is a deficient number, since it is larger than the sum of its proper divisors (437477805).

1312433403 is an equidigital number, since it uses as much as digits as its factorization.

1312433403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437477804.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 1312433403 is about 36227.5227278929. The cubic root of 1312433403 is about 1094.8612663834.

Adding to 1312433403 its reverse (3043342131), we get a palindrome (4355775534).

The spelling of 1312433403 in words is "one billion, three hundred twelve million, four hundred thirty-three thousand, four hundred three".