11963865 has 8 divisors (see below), whose sum is σ = 19142208. Its totient is φ = 6380720.

The previous prime is 11963857. The next prime is 11963867. The reversal of 11963865 is 56836911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11963865 - 2³ = 11963857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11963867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398781 + ... + 398810.

It is an arithmetic number, because the mean of its divisors is an integer number (2392776).

Almost surely, 2^11963865 is an apocalyptic number.

11963865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11963865 is a deficient number, since it is larger than the sum of its proper divisors (7178343).

11963865 is an equidigital number, since it uses as much as digits as its factorization.

11963865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797599.

The product of its digits is 38880, while the sum is 39.

The square root of 11963865 is about 3458.8820448232. The cubic root of 11963865 is about 228.7128160767.

The spelling of 11963865 in words is "eleven million, nine hundred sixty-three thousand, eight hundred sixty-five".