11100989 has 2 divisors, whose sum is σ = 11100990. Its totient is φ = 11100988.

The previous prime is 11100979. The next prime is 11101033. The reversal of 11100989 is 98900111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8508889 + 2592100 = 2917^2 + 1610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11100989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11100979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550494 + 5550495.

It is an arithmetic number, because the mean of its divisors is an integer number (5550495).

Almost surely, 2^11100989 is an apocalyptic number.

It is an amenable number.

11100989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11100989 is an equidigital number, since it uses as much as digits as its factorization.

11100989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 11100989 is about 3331.8146707162. The cubic root of 11100989 is about 223.0765353602.

The spelling of 11100989 in words is "eleven million, one hundred thousand, nine hundred eighty-nine".