1311200423 has 4 divisors (see below), whose sum is σ = 1412062008. Its totient is φ = 1210338840.

The previous prime is 1311200383. The next prime is 1311200437. The reversal of 1311200423 is 3240021131.

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-1311200423 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 (1311200323) 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, 50430773 + ... + 50430798.

It is an arithmetic number, because the mean of its divisors is an integer number (353015502).

Almost surely, 2^1311200423 is an apocalyptic number.

1311200423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1311200423 is a deficient number, since it is larger than the sum of its proper divisors (100861585).

1311200423 is a wasteful number, since it uses less digits than its factorization.

1311200423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100861584.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1311200423 is about 36210.5015568688. The cubic root of 1311200423 is about 1094.5182991387.

Adding to 1311200423 its reverse (3240021131), we get a palindrome (4551221554).

The spelling of 1311200423 in words is "one billion, three hundred eleven million, two hundred thousand, four hundred twenty-three".