1312330403 has 4 divisors (see below), whose sum is σ = 1337091408. Its totient is φ = 1287569400.

The previous prime is 1312330387. The next prime is 1312330421. The reversal of 1312330403 is 3040332131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3040332131 = 29 ⋅104839039.

It is a cyclic number.

It is not a de Polignac number, because 1312330403 - 2⁴ = 1312330387 is a prime.

It is a super-2 number, since 2×1312330403² = 3444422173276284818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312330423) 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, 12380423 + ... + 12380528.

It is an arithmetic number, because the mean of its divisors is an integer number (334272852).

Almost surely, 2^1312330403 is an apocalyptic number.

1312330403 is a deficient number, since it is larger than the sum of its proper divisors (24761005).

1312330403 is an equidigital number, since it uses as much as digits as its factorization.

1312330403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24761004.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1312330403 is about 36226.1011288822. The cubic root of 1312330403 is about 1094.8326240004.

Adding to 1312330403 its reverse (3040332131), we get a palindrome (4352662534).

The spelling of 1312330403 in words is "one billion, three hundred twelve million, three hundred thirty thousand, four hundred three".