11668819 has 2 divisors, whose sum is σ = 11668820. Its totient is φ = 11668818.

The previous prime is 11668807. The next prime is 11668823. The reversal of 11668819 is 91886611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11668819 - 2⁷ = 11668691 is a prime.

It is a super-2 number, since 2×11668819² = 272322673709522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11668859) 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, 5834409 + 5834410.

It is an arithmetic number, because the mean of its divisors is an integer number (5834410).

Almost surely, 2^11668819 is an apocalyptic number.

11668819 is a deficient number, since it is larger than the sum of its proper divisors (1).

11668819 is an equidigital number, since it uses as much as digits as its factorization.

11668819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 40.

The square root of 11668819 is about 3415.9653101283. The cubic root of 11668819 is about 226.8170169830.

The spelling of 11668819 in words is "eleven million, six hundred sixty-eight thousand, eight hundred nineteen".