11905213 has 2 divisors, whose sum is σ = 11905214. Its totient is φ = 11905212.

The previous prime is 11905193. The next prime is 11905217. The reversal of 11905213 is 31250911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10745284 + 1159929 = 3278^2 + 1077^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11905213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11905217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5952606 + 5952607.

It is an arithmetic number, because the mean of its divisors is an integer number (5952607).

Almost surely, 2^11905213 is an apocalyptic number.

It is an amenable number.

11905213 is a deficient number, since it is larger than the sum of its proper divisors (1).

11905213 is an equidigital number, since it uses as much as digits as its factorization.

11905213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 11905213 is about 3450.3931660030. The cubic root of 11905213 is about 228.3384541922.

The spelling of 11905213 in words is "eleven million, nine hundred five thousand, two hundred thirteen".