1312003133 has 4 divisors (see below), whose sum is σ = 1499432160. Its totient is φ = 1124574108.

The previous prime is 1312003127. The next prime is 1312003151. The reversal of 1312003133 is 3313002131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3313002131 = 67 ⋅49447793.

It is not a de Polignac number, because 1312003133 - 2⁴ = 1312003117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312003103) 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, 93714503 + ... + 93714516.

It is an arithmetic number, because the mean of its divisors is an integer number (374858040).

Almost surely, 2^1312003133 is an apocalyptic number.

It is an amenable number.

1312003133 is a deficient number, since it is larger than the sum of its proper divisors (187429027).

1312003133 is an equidigital number, since it uses as much as digits as its factorization.

1312003133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187429026.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 1312003133 is about 36221.5838002702. The cubic root of 1312003133 is about 1094.7416063570.

Adding to 1312003133 its reverse (3313002131), we get a palindrome (4625005264).

The spelling of 1312003133 in words is "one billion, three hundred twelve million, three thousand, one hundred thirty-three".