11981393 has 2 divisors, whose sum is σ = 11981394. Its totient is φ = 11981392.

The previous prime is 11981363. The next prime is 11981399. The reversal of 11981393 is 39318911.

11981393 is digitally balanced in base 2, because in such base 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., 9314704 + 2666689 = 3052^2 + 1633^2 .

It is a cyclic number.

It is not a de Polignac number, because 11981393 - 2⁶ = 11981329 is a prime.

It is not a weakly prime, because it can be changed into another prime (11981399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5990696 + 5990697.

It is an arithmetic number, because the mean of its divisors is an integer number (5990697).

Almost surely, 2^11981393 is an apocalyptic number.

It is an amenable number.

11981393 is a deficient number, since it is larger than the sum of its proper divisors (1).

11981393 is an equidigital number, since it uses as much as digits as its factorization.

11981393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 35.

The square root of 11981393 is about 3461.4148841189. The cubic root of 11981393 is about 228.8244556418.

The spelling of 11981393 in words is "eleven million, nine hundred eighty-one thousand, three hundred ninety-three".