13446981 has 12 divisors (see below), whose sum is σ = 20093580. Its totient is φ = 8655360.

The previous prime is 13446977. The next prime is 13446989. The reversal of 13446981 is 18964431.

13446981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2117025 + 11329956 = 1455^2 + 3366^2 .

It is not a de Polignac number, because 13446981 - 2² = 13446977 is a prime.

It is a super-2 number, since 2×13446981² = 361642596028722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13446989) 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 11 ways as a sum of consecutive naturals, for example, 25500 + ... + 26021.

It is an arithmetic number, because the mean of its divisors is an integer number (1674465).

Almost surely, 2^13446981 is an apocalyptic number.

It is an amenable number.

13446981 is a deficient number, since it is larger than the sum of its proper divisors (6646599).

13446981 is a wasteful number, since it uses less digits than its factorization.

13446981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51556 (or 51553 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 13446981 is about 3667.0125442927. The cubic root of 13446981 is about 237.7980361828.

The spelling of 13446981 in words is "thirteen million, four hundred forty-six thousand, nine hundred eighty-one".