11943813 has 16 divisors (see below), whose sum is σ = 18285696. Its totient is φ = 6792960.

The previous prime is 11943791. The next prime is 11943817. The reversal of 11943813 is 31834911.

It is not a de Polignac number, because 11943813 - 2⁸ = 11943557 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11943817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3673 + ... + 6113.

It is an arithmetic number, because the mean of its divisors is an integer number (1142856).

Almost surely, 2^11943813 is an apocalyptic number.

It is an amenable number.

11943813 is a deficient number, since it is larger than the sum of its proper divisors (6341883).

11943813 is a wasteful number, since it uses less digits than its factorization.

11943813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684.

The product of its digits is 2592, while the sum is 30.

The square root of 11943813 is about 3455.9822048153. The cubic root of 11943813 is about 228.5849668134.

The spelling of 11943813 in words is "eleven million, nine hundred forty-three thousand, eight hundred thirteen".