11929391 has 2 divisors, whose sum is σ = 11929392. Its totient is φ = 11929390.

The previous prime is 11929373. The next prime is 11929403. The reversal of 11929391 is 19392911.

It is a strong prime.

It is an emirp because it is prime and its reverse (19392911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11929391 - 2¹⁴ = 11913007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11929091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5964695 + 5964696.

It is an arithmetic number, because the mean of its divisors is an integer number (5964696).

Almost surely, 2^11929391 is an apocalyptic number.

11929391 is a deficient number, since it is larger than the sum of its proper divisors (1).

11929391 is an equidigital number, since it uses as much as digits as its factorization.

11929391 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 11929391 is about 3453.8950476238. The cubic root of 11929391 is about 228.4929252917.

The spelling of 11929391 in words is "eleven million, nine hundred twenty-nine thousand, three hundred ninety-one".