11643955 has 4 divisors (see below), whose sum is σ = 13972752. Its totient is φ = 9315160.

The previous prime is 11643953. The next prime is 11643971. The reversal of 11643955 is 55934611.

11643955 is digitally balanced in base 2, because in such base 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 an emirpimes, since its reverse is a distinct semiprime: 55934611 = 181 ⋅309031.

It is not a de Polignac number, because 11643955 - 2¹ = 11643953 is a prime.

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 11643955.

It is not an unprimeable number, because it can be changed into a prime (11643953) 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, 1164391 + ... + 1164400.

It is an arithmetic number, because the mean of its divisors is an integer number (3493188).

Almost surely, 2^11643955 is an apocalyptic number.

11643955 is a deficient number, since it is larger than the sum of its proper divisors (2328797).

11643955 is an equidigital number, since it uses as much as digits as its factorization.

11643955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328796.

The product of its digits is 16200, while the sum is 34.

The square root of 11643955 is about 3412.3239881348. The cubic root of 11643955 is about 226.6558013342.

The spelling of 11643955 in words is "eleven million, six hundred forty-three thousand, nine hundred fifty-five".