11887969 has 4 divisors (see below), whose sum is σ = 12089520. Its totient is φ = 11686420.

The previous prime is 11887963. The next prime is 11887979. The reversal of 11887969 is 96978811.

11887969 is digitally balanced in base 2 and base 3, because in such bases 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11887969 - 2⁹ = 11887457 is a prime.

It is a super-2 number, since 2×11887969² = 282647613889922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11887963) 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, 100687 + ... + 100804.

It is an arithmetic number, because the mean of its divisors is an integer number (3022380).

Almost surely, 2^11887969 is an apocalyptic number.

It is an amenable number.

11887969 is a deficient number, since it is larger than the sum of its proper divisors (201551).

11887969 is an equidigital number, since it uses as much as digits as its factorization.

11887969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201550.

The product of its digits is 217728, while the sum is 49.

The square root of 11887969 is about 3447.8934148259. The cubic root of 11887969 is about 228.2281559864.

The spelling of 11887969 in words is "eleven million, eight hundred eighty-seven thousand, nine hundred sixty-nine".