11998213 has 2 divisors, whose sum is σ = 11998214. Its totient is φ = 11998212.

The previous prime is 11998201. The next prime is 11998223. The reversal of 11998213 is 31289911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11985444 + 12769 = 3462^2 + 113^2 .

It is a cyclic number.

It is not a de Polignac number, because 11998213 - 2²¹ = 9901061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11998223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5999106 + 5999107.

It is an arithmetic number, because the mean of its divisors is an integer number (5999107).

Almost surely, 2^11998213 is an apocalyptic number.

It is an amenable number.

11998213 is a deficient number, since it is larger than the sum of its proper divisors (1).

11998213 is an equidigital number, since it uses as much as digits as its factorization.

11998213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 34.

The square root of 11998213 is about 3463.8436743017. The cubic root of 11998213 is about 228.9314834779.

The spelling of 11998213 in words is "eleven million, nine hundred ninety-eight thousand, two hundred thirteen".