1312312303 has 4 divisors (see below), whose sum is σ = 1312702920. Its totient is φ = 1311921688.

The previous prime is 1312312259. The next prime is 1312312327. The reversal of 1312312303 is 3032132131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312312303 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 (1312312363) 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, 190225 + ... + 197002.

It is an arithmetic number, because the mean of its divisors is an integer number (328175730).

Almost surely, 2^1312312303 is an apocalyptic number.

1312312303 is a deficient number, since it is larger than the sum of its proper divisors (390617).

1312312303 is an equidigital number, since it uses as much as digits as its factorization.

1312312303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390616.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1312312303 is about 36225.8513081473. The cubic root of 1312312303 is about 1094.8275905725.

Adding to 1312312303 its reverse (3032132131), we get a palindrome (4344444434).

The spelling of 1312312303 in words is "one billion, three hundred twelve million, three hundred twelve thousand, three hundred three".