11011993 has 2 divisors, whose sum is σ = 11011994. Its totient is φ = 11011992.

The previous prime is 11011981. The next prime is 11012011. The reversal of 11011993 is 39911011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6290064 + 4721929 = 2508^2 + 2173^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11011993 is a prime.

It is not a weakly prime, because it can be changed into another prime (11011933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505996 + 5505997.

It is an arithmetic number, because the mean of its divisors is an integer number (5505997).

Almost surely, 2^11011993 is an apocalyptic number.

It is an amenable number.

11011993 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011993 is an equidigital number, since it uses as much as digits as its factorization.

11011993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 25.

The square root of 11011993 is about 3318.4323105949. The cubic root of 11011993 is about 222.4788045290.

The spelling of 11011993 in words is "eleven million, eleven thousand, nine hundred ninety-three".