11021993 has 2 divisors, whose sum is σ = 11021994. Its totient is φ = 11021992.

The previous prime is 11021981. The next prime is 11022023. The reversal of 11021993 is 39912011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5583769 + 5438224 = 2363^2 + 2332^2 .

It is a cyclic number.

It is not a de Polignac number, because 11021993 - 2⁶ = 11021929 is a prime.

It is not a weakly prime, because it can be changed into another prime (11021903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510996 + 5510997.

It is an arithmetic number, because the mean of its divisors is an integer number (5510997).

Almost surely, 2^11021993 is an apocalyptic number.

It is an amenable number.

11021993 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021993 is an equidigital number, since it uses as much as digits as its factorization.

11021993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 11021993 is about 3319.9387042534. The cubic root of 11021993 is about 222.5461285499.

The spelling of 11021993 in words is "eleven million, twenty-one thousand, nine hundred ninety-three".