1311131723903 has 4 divisors (see below), whose sum is σ = 1380138656760. Its totient is φ = 1242124791048.

The previous prime is 1311131723897. The next prime is 1311131723977. The reversal of 1311131723903 is 3093271311131.

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

It is a cyclic number.

It is not a de Polignac number, because 1311131723903 - 2³⁸ = 1036253816959 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 (1311131723983) 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, 34503466400 + ... + 34503466437.

It is an arithmetic number, because the mean of its divisors is an integer number (345034664190).

Almost surely, 2^{1311131723903} is an apocalyptic number.

1311131723903 is a deficient number, since it is larger than the sum of its proper divisors (69006932857).

1311131723903 is an equidigital number, since it uses as much as digits as its factorization.

1311131723903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69006932856.

The product of its (nonzero) digits is 10206, while the sum is 35.

The spelling of 1311131723903 in words is "one trillion, three hundred eleven billion, one hundred thirty-one million, seven hundred twenty-three thousand, nine hundred three".