13920211 has 2 divisors, whose sum is σ = 13920212. Its totient is φ = 13920210.

The previous prime is 13920199. The next prime is 13920227. The reversal of 13920211 is 11202931.

It is a weak prime.

It is an emirp because it is prime and its reverse (11202931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13920211 - 2⁹ = 13919699 is a prime.

It is not a weakly prime, because it can be changed into another prime (13920241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6960105 + 6960106.

It is an arithmetic number, because the mean of its divisors is an integer number (6960106).

Almost surely, 2^13920211 is an apocalyptic number.

13920211 is a deficient number, since it is larger than the sum of its proper divisors (1).

13920211 is an equidigital number, since it uses as much as digits as its factorization.

13920211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 13920211 is about 3730.9798980965. The cubic root of 13920211 is about 240.5554899240. Note that the first 3 decimals are identical.

The spelling of 13920211 in words is "thirteen million, nine hundred twenty thousand, two hundred eleven".