11889481 has 2 divisors, whose sum is σ = 11889482. Its totient is φ = 11889480.

The previous prime is 11889473. The next prime is 11889487. The reversal of 11889481 is 18498811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8649481 + 3240000 = 2941^2 + 1800^2 .

It is an emirp because it is prime and its reverse (18498811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11889481 - 2³ = 11889473 is a prime.

It is a super-2 number, since 2×11889481² = 282719516898722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11889487) 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, 5944740 + 5944741.

It is an arithmetic number, because the mean of its divisors is an integer number (5944741).

Almost surely, 2^11889481 is an apocalyptic number.

It is an amenable number.

11889481 is a deficient number, since it is larger than the sum of its proper divisors (1).

11889481 is an equidigital number, since it uses as much as digits as its factorization.

11889481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 40.

The square root of 11889481 is about 3448.1126721730. The cubic root of 11889481 is about 228.2378314924.

The spelling of 11889481 in words is "eleven million, eight hundred eighty-nine thousand, four hundred eighty-one".