11481389 has 2 divisors, whose sum is σ = 11481390. Its totient is φ = 11481388.

The previous prime is 11481383. The next prime is 11481391. The reversal of 11481389 is 98318411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8702500 + 2778889 = 2950^2 + 1667^2 .

It is a cyclic number.

It is not a de Polignac number, because 11481389 - 2¹² = 11477293 is a prime.

Together with 11481391, 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 (11481383) 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, 5740694 + 5740695.

It is an arithmetic number, because the mean of its divisors is an integer number (5740695).

Almost surely, 2^11481389 is an apocalyptic number.

It is an amenable number.

11481389 is a deficient number, since it is larger than the sum of its proper divisors (1).

11481389 is an equidigital number, since it uses as much as digits as its factorization.

11481389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 35.

The square root of 11481389 is about 3388.4198382137. The cubic root of 11481389 is about 225.5960426871.

The spelling of 11481389 in words is "eleven million, four hundred eighty-one thousand, three hundred eighty-nine".