10975981 has 2 divisors, whose sum is σ = 10975982. Its totient is φ = 10975980.

The previous prime is 10975967. The next prime is 10975997. The reversal of 10975981 is 18957901.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10956100 + 19881 = 3310^2 + 141^2 .

It is a cyclic number.

It is not a de Polignac number, because 10975981 - 2¹¹ = 10973933 is a prime.

It is a super-2 number, since 2×10975981² = 240944317824722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10975681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5487990 + 5487991.

It is an arithmetic number, because the mean of its divisors is an integer number (5487991).

Almost surely, 2^10975981 is an apocalyptic number.

It is an amenable number.

10975981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10975981 is an equidigital number, since it uses as much as digits as its factorization.

10975981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 10975981 is about 3313.0018110469. The cubic root of 10975981 is about 222.2360190415.

The spelling of 10975981 in words is "ten million, nine hundred seventy-five thousand, nine hundred eighty-one".