11154989 has 2 divisors, whose sum is σ = 11154990. Its totient is φ = 11154988.

The previous prime is 11154961. The next prime is 11154991. The reversal of 11154989 is 98945111.

11154989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5712100 + 5442889 = 2390^2 + 2333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11154989 is a prime.

Together with 11154991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11154959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5577494 + 5577495.

It is an arithmetic number, because the mean of its divisors is an integer number (5577495).

Almost surely, 2^11154989 is an apocalyptic number.

It is an amenable number.

11154989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11154989 is an equidigital number, since it uses as much as digits as its factorization.

11154989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 38.

The square root of 11154989 is about 3339.9085316817. The cubic root of 11154989 is about 223.4376639345.

The spelling of 11154989 in words is "eleven million, one hundred fifty-four thousand, nine hundred eighty-nine".