13468981 has 4 divisors (see below), whose sum is σ = 14261292. Its totient is φ = 12676672.

The previous prime is 13468979. The next prime is 13468997. The reversal of 13468981 is 18986431.

13468981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10458756 + 3010225 = 3234^2 + 1735^2 .

It is a cyclic number.

It is not a de Polignac number, because 13468981 - 2¹ = 13468979 is a prime.

It is a super-2 number, since 2×13468981² = 362826898356722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13468901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396130 + ... + 396163.

It is an arithmetic number, because the mean of its divisors is an integer number (3565323).

Almost surely, 2^13468981 is an apocalyptic number.

It is an amenable number.

13468981 is a deficient number, since it is larger than the sum of its proper divisors (792311).

13468981 is an equidigital number, since it uses as much as digits as its factorization.

13468981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792310.

The product of its digits is 41472, while the sum is 40.

The square root of 13468981 is about 3670.0110354058. The cubic root of 13468981 is about 237.9276490763.

It can be divided in two parts, 134689 and 81, that multiplied together give a square (10909809 = 3303²).

The spelling of 13468981 in words is "thirteen million, four hundred sixty-eight thousand, nine hundred eighty-one".