11818393 has 2 divisors, whose sum is σ = 11818394. Its totient is φ = 11818392.

The previous prime is 11818337. The next prime is 11818439. The reversal of 11818393 is 39381811.

It is a happy number.

11818393 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 strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11539609 + 278784 = 3397^2 + 528^2 .

It is a cyclic number.

It is not a de Polignac number, because 11818393 - 2²¹ = 9721241 is a prime.

It is a super-3 number, since 3×11818393³ (a number of 22 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (11818333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5909196 + 5909197.

It is an arithmetic number, because the mean of its divisors is an integer number (5909197).

Almost surely, 2^11818393 is an apocalyptic number.

It is an amenable number.

11818393 is a deficient number, since it is larger than the sum of its proper divisors (1).

11818393 is an equidigital number, since it uses as much as digits as its factorization.

11818393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The square root of 11818393 is about 3437.7889696722. The cubic root of 11818393 is about 227.7820388037.

The spelling of 11818393 in words is "eleven million, eight hundred eighteen thousand, three hundred ninety-three".