11929913 has 2 divisors, whose sum is σ = 11929914. Its totient is φ = 11929912.

The previous prime is 11929889. The next prime is 11929919. The reversal of 11929913 is 31992911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11888704 + 41209 = 3448^2 + 203^2 .

It is an emirp because it is prime and its reverse (31992911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11929913 - 2⁶ = 11929849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11929919) 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, 5964956 + 5964957.

It is an arithmetic number, because the mean of its divisors is an integer number (5964957).

Almost surely, 2^11929913 is an apocalyptic number.

It is an amenable number.

11929913 is a deficient number, since it is larger than the sum of its proper divisors (1).

11929913 is an equidigital number, since it uses as much as digits as its factorization.

11929913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374, while the sum is 35.

The square root of 11929913 is about 3453.9706136561. The cubic root of 11929913 is about 228.4962580008.

The spelling of 11929913 in words is "eleven million, nine hundred twenty-nine thousand, nine hundred thirteen".