10949981 has 6 divisors (see below), whose sum is σ = 12737790. Its totient is φ = 9385656.

The previous prime is 10949971. The next prime is 10950007. The reversal of 10949981 is 18994901.

It can be written as a sum of positive squares in only one way, i.e., 8357881 + 2592100 = 2891^2 + 1610^2 .

It is not a de Polignac number, because 10949981 - 2¹⁰ = 10948957 is a prime.

It is a super-2 number, since 2×10949981² = 239804167800722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10949971) 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 in 5 ways as a sum of consecutive naturals, for example, 111686 + ... + 111783.

It is an arithmetic number, because the mean of its divisors is an integer number (2122965).

Almost surely, 2^10949981 is an apocalyptic number.

It is an amenable number.

10949981 is a deficient number, since it is larger than the sum of its proper divisors (1787809).

10949981 is an equidigital number, since it uses as much as digits as its factorization.

10949981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223483 (or 223476 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 10949981 is about 3309.0755506637. The cubic root of 10949981 is about 222.0604020909.

The spelling of 10949981 in words is "ten million, nine hundred forty-nine thousand, nine hundred eighty-one".