11943801287 has 4 divisors (see below), whose sum is σ = 13029601416. Its totient is φ = 10858001160.

The previous prime is 11943801271. The next prime is 11943801319. The reversal of 11943801287 is 78210834911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78210834911 = 11 ⋅7110075901.

It is a cyclic number.

It is not a de Polignac number, because 11943801287 - 2⁴ = 11943801271 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 (11943801787) 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, 542900048 + ... + 542900069.

It is an arithmetic number, because the mean of its divisors is an integer number (3257400354).

Almost surely, 2^11943801287 is an apocalyptic number.

11943801287 is a deficient number, since it is larger than the sum of its proper divisors (1085800129).

11943801287 is a wasteful number, since it uses less digits than its factorization.

11943801287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085800128.

The product of its (nonzero) digits is 96768, while the sum is 44.

The spelling of 11943801287 in words is "eleven billion, nine hundred forty-three million, eight hundred one thousand, two hundred eighty-seven".