11975819 has 2 divisors, whose sum is σ = 11975820. Its totient is φ = 11975818.

The previous prime is 11975809. The next prime is 11975849. The reversal of 11975819 is 91857911.

It is a weak prime.

It is an emirp because it is prime and its reverse (91857911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11975819 - 2⁸ = 11975563 is a prime.

It is a super-2 number, since 2×11975819² = 286840481441522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11975809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5987909 + 5987910.

It is an arithmetic number, because the mean of its divisors is an integer number (5987910).

Almost surely, 2^11975819 is an apocalyptic number.

11975819 is a deficient number, since it is larger than the sum of its proper divisors (1).

11975819 is an equidigital number, since it uses as much as digits as its factorization.

11975819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 41.

The square root of 11975819 is about 3460.6096283747. The cubic root of 11975819 is about 228.7889654625.

The spelling of 11975819 in words is "eleven million, nine hundred seventy-five thousand, eight hundred nineteen".