11146981 has 2 divisors, whose sum is σ = 11146982. Its totient is φ = 11146980.

The previous prime is 11146963. The next prime is 11146987. The reversal of 11146981 is 18964111.

11146981 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., 11088900 + 58081 = 3330^2 + 241^2 .

It is an emirp because it is prime and its reverse (18964111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11146981 - 2⁷ = 11146853 is a prime.

It is a super-2 number, since 2×11146981² = 248510370828722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11146987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5573490 + 5573491.

It is an arithmetic number, because the mean of its divisors is an integer number (5573491).

Almost surely, 2^11146981 is an apocalyptic number.

It is an amenable number.

11146981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11146981 is an equidigital number, since it uses as much as digits as its factorization.

11146981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 31.

The square root of 11146981 is about 3338.7094812217. The cubic root of 11146981 is about 223.3841836143.

The spelling of 11146981 in words is "eleven million, one hundred forty-six thousand, nine hundred eighty-one".