11331989 has 2 divisors, whose sum is σ = 11331990. Its totient is φ = 11331988.

The previous prime is 11331977. The next prime is 11332001. The reversal of 11331989 is 98913311.

It is a balanced prime because it is at equal distance from previous prime (11331977) and next prime (11332001).

It can be written as a sum of positive squares in only one way, i.e., 11122225 + 209764 = 3335^2 + 458^2 .

It is a cyclic number.

It is not a de Polignac number, because 11331989 - 2⁴ = 11331973 is a prime.

It is a super-2 number, since 2×11331989² = 256827949392242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11331289) 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, 5665994 + 5665995.

It is an arithmetic number, because the mean of its divisors is an integer number (5665995).

Almost surely, 2^11331989 is an apocalyptic number.

It is an amenable number.

11331989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331989 is an equidigital number, since it uses as much as digits as its factorization.

11331989 is an odious number, because the sum of its binary digits is odd.

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

The square root of 11331989 is about 3366.3019769474. The cubic root of 11331989 is about 224.6132549592.

The spelling of 11331989 in words is "eleven million, three hundred thirty-one thousand, nine hundred eighty-nine".