11923969 has 2 divisors, whose sum is σ = 11923970. Its totient is φ = 11923968.

The previous prime is 11923931. The next prime is 11923979. The reversal of 11923969 is 96932911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10810944 + 1113025 = 3288^2 + 1055^2 .

It is an emirp because it is prime and its reverse (96932911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11923969 - 2¹⁷ = 11792897 is a prime.

It is a super-2 number, since 2×11923969² = 284362073425922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11923909) 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, 5961984 + 5961985.

It is an arithmetic number, because the mean of its divisors is an integer number (5961985).

Almost surely, 2^11923969 is an apocalyptic number.

It is an amenable number.

11923969 is a deficient number, since it is larger than the sum of its proper divisors (1).

11923969 is an equidigital number, since it uses as much as digits as its factorization.

11923969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 40.

The square root of 11923969 is about 3453.1100474789. The cubic root of 11923969 is about 228.4583027816.

The spelling of 11923969 in words is "eleven million, nine hundred twenty-three thousand, nine hundred sixty-nine".