11644001 has 2 divisors, whose sum is σ = 11644002. Its totient is φ = 11644000.

The previous prime is 11643991. The next prime is 11644007. The reversal of 11644001 is 10044611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9891025 + 1752976 = 3145^2 + 1324^2 .

It is an emirp because it is prime and its reverse (10044611) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11644001 is a prime.

It is not a weakly prime, because it can be changed into another prime (11644007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5822000 + 5822001.

It is an arithmetic number, because the mean of its divisors is an integer number (5822001).

Almost surely, 2^11644001 is an apocalyptic number.

It is an amenable number.

11644001 is a deficient number, since it is larger than the sum of its proper divisors (1).

11644001 is an equidigital number, since it uses as much as digits as its factorization.

11644001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 11644001 is about 3412.3307284025. The cubic root of 11644001 is about 226.6560998054.

Adding to 11644001 its reverse (10044611), we get a palindrome (21688612).

The spelling of 11644001 in words is "eleven million, six hundred forty-four thousand, one".