1312403003 has 8 divisors (see below), whose sum is σ = 1316896560. Its totient is φ = 1307917440.

The previous prime is 1312402991. The next prime is 1312403039. The reversal of 1312403003 is 3003042131.

It is a happy number.

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 1312403003 - 2⁶ = 1312402939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312403083) 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, 574223 + ... + 576503.

It is an arithmetic number, because the mean of its divisors is an integer number (164612070).

Almost surely, 2^1312403003 is an apocalyptic number.

1312403003 is a deficient number, since it is larger than the sum of its proper divisors (4493557).

1312403003 is a wasteful number, since it uses less digits than its factorization.

1312403003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1312403003 is about 36227.1031549584. The cubic root of 1312403003 is about 1094.8528128651.

Adding to 1312403003 its reverse (3003042131), we get a palindrome (4315445134).

The spelling of 1312403003 in words is "one billion, three hundred twelve million, four hundred three thousand, three".