1312311303 has 6 divisors (see below), whose sum is σ = 1895560784. Its totient is φ = 874874196.

The previous prime is 1312311283. The next prime is 1312311317. The reversal of 1312311303 is 3031132131.

It is a happy number.

1312311303 is a `hidden beast` number, since 131 + 231 + 1 + 303 = 666.

It is not a de Polignac number, because 1312311303 - 2⁸ = 1312311047 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 (1312311373) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72906175 + ... + 72906192.

Almost surely, 2^1312311303 is an apocalyptic number.

1312311303 is a deficient number, since it is larger than the sum of its proper divisors (583249481).

1312311303 is a wasteful number, since it uses less digits than its factorization.

1312311303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145812373 (or 145812370 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1312311303 is about 36225.8375058466. The cubic root of 1312311303 is about 1094.8273124812.

Adding to 1312311303 its reverse (3031132131), we get a palindrome (4343443434).

The spelling of 1312311303 in words is "one billion, three hundred twelve million, three hundred eleven thousand, three hundred three".