11112989 has 2 divisors, whose sum is σ = 11112990. Its totient is φ = 11112988.

The previous prime is 11112977. The next prime is 11113007. The reversal of 11112989 is 98921111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6943225 + 4169764 = 2635^2 + 2042^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112989 - 2⁸ = 11112733 is a prime.

It is a super-3 number, since 3×11112989³ (a number of 22 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112949) 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, 5556494 + 5556495.

It is an arithmetic number, because the mean of its divisors is an integer number (5556495).

Almost surely, 2^11112989 is an apocalyptic number.

It is an amenable number.

11112989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112989 is an equidigital number, since it uses as much as digits as its factorization.

11112989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 32.

The square root of 11112989 is about 3333.6150047658. The cubic root of 11112989 is about 223.1568871929.

The spelling of 11112989 in words is "eleven million, one hundred twelve thousand, nine hundred eighty-nine".