13480981 has 2 divisors, whose sum is σ = 13480982. Its totient is φ = 13480980.

The previous prime is 13480979. The next prime is 13480991. The reversal of 13480981 is 18908431.

It is a happy number.

13480981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8213956 + 5267025 = 2866^2 + 2295^2 .

It is a cyclic number.

It is not a de Polignac number, because 13480981 - 2¹ = 13480979 is a prime.

It is a super-2 number, since 2×13480981² = 363473697444722, which contains 22 as substring.

Together with 13480979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13480991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6740490 + 6740491.

It is an arithmetic number, because the mean of its divisors is an integer number (6740491).

Almost surely, 2^13480981 is an apocalyptic number.

It is an amenable number.

13480981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13480981 is an equidigital number, since it uses as much as digits as its factorization.

13480981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 13480981 is about 3671.6455438945. The cubic root of 13480981 is about 237.9982875380.

The spelling of 13480981 in words is "thirteen million, four hundred eighty thousand, nine hundred eighty-one".