11929871 has 2 divisors, whose sum is σ = 11929872. Its totient is φ = 11929870.

The previous prime is 11929861. The next prime is 11929889. The reversal of 11929871 is 17892911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11929871 - 2¹⁸ = 11667727 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11929861) 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, 5964935 + 5964936.

It is an arithmetic number, because the mean of its divisors is an integer number (5964936).

Almost surely, 2^11929871 is an apocalyptic number.

11929871 is a deficient number, since it is larger than the sum of its proper divisors (1).

11929871 is an equidigital number, since it uses as much as digits as its factorization.

11929871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 38.

The square root of 11929871 is about 3453.9645336917. The cubic root of 11929871 is about 228.4959898554.

The spelling of 11929871 in words is "eleven million, nine hundred twenty-nine thousand, eight hundred seventy-one".