1311000004423 has 4 divisors (see below), whose sum is σ = 1388117651760. Its totient is φ = 1233882357088.

The previous prime is 1311000004357. The next prime is 1311000004429. The reversal of 1311000004423 is 3244000001131.

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-1311000004423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311000004423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311000004429) 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, 38558823643 + ... + 38558823676.

It is an arithmetic number, because the mean of its divisors is an integer number (347029412940).

Almost surely, 2^{1311000004423} is an apocalyptic number.

1311000004423 is a deficient number, since it is larger than the sum of its proper divisors (77117647337).

1311000004423 is an equidigital number, since it uses as much as digits as its factorization.

1311000004423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77117647336.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1311000004423 its reverse (3244000001131), we get a palindrome (4555000005554).

The spelling of 1311000004423 in words is "one trillion, three hundred eleven billion, four thousand, four hundred twenty-three".