11857943 has 4 divisors (see below), whose sum is σ = 11865840. Its totient is φ = 11850048.

The previous prime is 11857931. The next prime is 11857969. The reversal of 11857943 is 34975811.

11857943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11857943 - 2¹⁰ = 11856919 is a prime.

It is a super-2 number, since 2×11857943² = 281221624382498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11857897 and 11857906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11857913) 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, 923 + ... + 4956.

It is an arithmetic number, because the mean of its divisors is an integer number (2966460).

Almost surely, 2^11857943 is an apocalyptic number.

11857943 is a deficient number, since it is larger than the sum of its proper divisors (7897).

11857943 is an equidigital number, since it uses as much as digits as its factorization.

11857943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7896.

The product of its digits is 30240, while the sum is 38.

The square root of 11857943 is about 3443.5364089842. The cubic root of 11857943 is about 228.0358451389.

The spelling of 11857943 in words is "eleven million, eight hundred fifty-seven thousand, nine hundred forty-three".