1311703745 has 16 divisors (see below), whose sum is σ = 1718228160. Its totient is φ = 953361600.

The previous prime is 1311703739. The next prime is 1311703781. The reversal of 1311703745 is 5473071131.

It is not a de Polignac number, because 1311703745 - 2¹⁸ = 1311441601 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91730 + ... + 105060.

It is an arithmetic number, because the mean of its divisors is an integer number (107389260).

Almost surely, 2^1311703745 is an apocalyptic number.

It is an amenable number.

1311703745 is a deficient number, since it is larger than the sum of its proper divisors (406524415).

1311703745 is a wasteful number, since it uses less digits than its factorization.

1311703745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15136.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 1311703745 is about 36217.4508351982. The cubic root of 1311703745 is about 1094.6583297690.

Adding to 1311703745 its reverse (5473071131), we get a palindrome (6784774876).

The spelling of 1311703745 in words is "one billion, three hundred eleven million, seven hundred three thousand, seven hundred forty-five".