11191913 has 2 divisors, whose sum is σ = 11191914. Its totient is φ = 11191912.

The previous prime is 11191907. The next prime is 11191937. The reversal of 11191913 is 31919111.

It is a happy number.

11191913 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7795264 + 3396649 = 2792^2 + 1843^2 .

It is a cyclic number.

It is not a de Polignac number, because 11191913 - 2⁴ = 11191897 is a prime.

It is not a weakly prime, because it can be changed into another prime (11191903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5595956 + 5595957.

It is an arithmetic number, because the mean of its divisors is an integer number (5595957).

Almost surely, 2^11191913 is an apocalyptic number.

It is an amenable number.

11191913 is a deficient number, since it is larger than the sum of its proper divisors (1).

11191913 is an equidigital number, since it uses as much as digits as its factorization.

11191913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243, while the sum is 26.

The square root of 11191913 is about 3345.4316612360. The cubic root of 11191913 is about 223.6839252271.

The spelling of 11191913 in words is "eleven million, one hundred ninety-one thousand, nine hundred thirteen".