1312003803 has 16 divisors (see below), whose sum is σ = 1926902016. Its totient is φ = 787431840.

The previous prime is 1312003783. The next prime is 1312003829. The reversal of 1312003803 is 3083002131.

It is a happy number.

It is not a de Polignac number, because 1312003803 - 2⁶ = 1312003739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312003803.

It is not an unprimeable number, because it can be changed into a prime (1312003843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189600 + ... + 196397.

It is an arithmetic number, because the mean of its divisors is an integer number (120431376).

Almost surely, 2^1312003803 is an apocalyptic number.

1312003803 is a deficient number, since it is larger than the sum of its proper divisors (614898213).

1312003803 is a wasteful number, since it uses less digits than its factorization.

1312003803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386114.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1312003803 is about 36221.5930488983. The cubic root of 1312003803 is about 1094.7417927074.

Adding to 1312003803 its reverse (3083002131), we get a palindrome (4395005934).

The spelling of 1312003803 in words is "one billion, three hundred twelve million, three thousand, eight hundred three".