11965943 has 16 divisors (see below), whose sum is σ = 14061600. Its totient is φ = 10060800.

The previous prime is 11965931. The next prime is 11965949. The reversal of 11965943 is 34956911.

It is a cyclic number.

It is not a de Polignac number, because 11965943 - 2⁶ = 11965879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11965897 and 11965906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11965949) 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, 10883 + ... + 11931.

It is an arithmetic number, because the mean of its divisors is an integer number (878850).

Almost surely, 2^11965943 is an apocalyptic number.

11965943 is a deficient number, since it is larger than the sum of its proper divisors (2095657).

11965943 is a wasteful number, since it uses less digits than its factorization.

11965943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138.

The product of its digits is 29160, while the sum is 38.

The square root of 11965943 is about 3459.1824178554. The cubic root of 11965943 is about 228.7260569961.

The spelling of 11965943 in words is "eleven million, nine hundred sixty-five thousand, nine hundred forty-three".