10806981 has 16 divisors (see below), whose sum is σ = 14774400. Its totient is φ = 7024640.

The previous prime is 10806973. The next prime is 10806989. The reversal of 10806981 is 18960801.

10806981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (10806973) and next prime (10806989).

It is a cyclic number.

It is not a de Polignac number, because 10806981 - 2³ = 10806973 is a prime.

It is a super-2 number, since 2×10806981² = 233581676668722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10806989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23845 + ... + 24293.

It is an arithmetic number, because the mean of its divisors is an integer number (923400).

Almost surely, 2^10806981 is an apocalyptic number.

It is an amenable number.

10806981 is a deficient number, since it is larger than the sum of its proper divisors (3967419).

10806981 is a wasteful number, since it uses less digits than its factorization.

10806981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 10806981 is about 3287.3972987760. The cubic root of 10806981 is about 221.0895060009.

The spelling of 10806981 in words is "ten million, eight hundred six thousand, nine hundred eighty-one".