1311303591 has 12 divisors (see below), whose sum is σ = 2039805768. Its totient is φ = 806955984.

The previous prime is 1311303571. The next prime is 1311303593. The reversal of 1311303591 is 1953031131.

It is not a de Polignac number, because 1311303591 - 2¹³ = 1311295399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311303593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5603745 + ... + 5603978.

It is an arithmetic number, because the mean of its divisors is an integer number (169983814).

Almost surely, 2^1311303591 is an apocalyptic number.

1311303591 is a deficient number, since it is larger than the sum of its proper divisors (728502177).

1311303591 is a wasteful number, since it uses less digits than its factorization.

1311303591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11207742 (or 11207739 counting only the distinct ones).

The product of its (nonzero) digits is 1215, while the sum is 27.

The square root of 1311303591 is about 36211.9260879617. The cubic root of 1311303591 is about 1094.5470047178.

The spelling of 1311303591 in words is "one billion, three hundred eleven million, three hundred three thousand, five hundred ninety-one".