11955643 has 8 divisors (see below), whose sum is σ = 13687520. Its totient is φ = 10229760.

The previous prime is 11955599. The next prime is 11955649. The reversal of 11955643 is 34655911.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11955643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11955599 and 11955608.

It is not an unprimeable number, because it can be changed into a prime (11955649) 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, 4273 + ... + 6493.

It is an arithmetic number, because the mean of its divisors is an integer number (1710940).

Almost surely, 2^11955643 is an apocalyptic number.

11955643 is a deficient number, since it is larger than the sum of its proper divisors (1731877).

11955643 is an equidigital number, since it uses as much as digits as its factorization.

11955643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997.

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

The square root of 11955643 is about 3457.6933062376. The cubic root of 11955643 is about 228.6604108349.

The spelling of 11955643 in words is "eleven million, nine hundred fifty-five thousand, six hundred forty-three".