11644819 has 2 divisors, whose sum is σ = 11644820. Its totient is φ = 11644818.

The previous prime is 11644811. The next prime is 11644823. The reversal of 11644819 is 91844611.

It is a strong prime.

It is an emirp because it is prime and its reverse (91844611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11644819 - 2³ = 11644811 is a prime.

It is a super-2 number, since 2×11644819² = 271203619085522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11644811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5822409 + 5822410.

It is an arithmetic number, because the mean of its divisors is an integer number (5822410).

Almost surely, 2^11644819 is an apocalyptic number.

11644819 is a deficient number, since it is larger than the sum of its proper divisors (1).

11644819 is an equidigital number, since it uses as much as digits as its factorization.

11644819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 34.

The square root of 11644819 is about 3412.4505857228. The cubic root of 11644819 is about 226.6614072694.

The spelling of 11644819 in words is "eleven million, six hundred forty-four thousand, eight hundred nineteen".