11029981 has 2 divisors, whose sum is σ = 11029982. Its totient is φ = 11029980.

The previous prime is 11029979. The next prime is 11029999. The reversal of 11029981 is 18992011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8173881 + 2856100 = 2859^2 + 1690^2 .

It is a cyclic number.

It is not a de Polignac number, because 11029981 - 2¹ = 11029979 is a prime.

It is a super-2 number, since 2×11029981² = 243320961720722, which contains 22 as substring.

Together with 11029979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11021981) 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, 5514990 + 5514991.

It is an arithmetic number, because the mean of its divisors is an integer number (5514991).

Almost surely, 2^11029981 is an apocalyptic number.

It is an amenable number.

11029981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11029981 is an equidigital number, since it uses as much as digits as its factorization.

11029981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 11029981 is about 3321.1415206221. The cubic root of 11029981 is about 222.5998777280.

The spelling of 11029981 in words is "eleven million, twenty-nine thousand, nine hundred eighty-one".