11963881 has 4 divisors (see below), whose sum is σ = 12043264. Its totient is φ = 11884500.

The previous prime is 11963879. The next prime is 11963891. The reversal of 11963881 is 18836911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18836911 = 2027 ⋅9293.

It is a cyclic number.

It is not a de Polignac number, because 11963881 - 2¹ = 11963879 is a prime.

It is a super-2 number, since 2×11963881² = 286268897164322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11963881.

It is not an unprimeable number, because it can be changed into a prime (11963821) 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, 39465 + ... + 39766.

It is an arithmetic number, because the mean of its divisors is an integer number (3010816).

Almost surely, 2^11963881 is an apocalyptic number.

It is an amenable number.

11963881 is a deficient number, since it is larger than the sum of its proper divisors (79383).

11963881 is an equidigital number, since it uses as much as digits as its factorization.

11963881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79382.

The product of its digits is 10368, while the sum is 37.

The square root of 11963881 is about 3458.8843577084. The cubic root of 11963881 is about 228.7129180338.

It can be divided in two parts, 119 and 63881, that added together give a cube (64000 = 40³).

The spelling of 11963881 in words is "eleven million, nine hundred sixty-three thousand, eight hundred eighty-one".