13075981 has 2 divisors, whose sum is σ = 13075982. Its totient is φ = 13075980.

The previous prime is 13075973. The next prime is 13075991. The reversal of 13075981 is 18957031.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8213956 + 4862025 = 2866^2 + 2205^2 .

It is a cyclic number.

It is not a de Polignac number, because 13075981 - 2³ = 13075973 is a prime.

It is a super-2 number, since 2×13075981² = 341962558224722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13075901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6537990 + 6537991.

It is an arithmetic number, because the mean of its divisors is an integer number (6537991).

Almost surely, 2^13075981 is an apocalyptic number.

It is an amenable number.

13075981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13075981 is an equidigital number, since it uses as much as digits as its factorization.

13075981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 13075981 is about 3616.0725932979. The cubic root of 13075981 is about 235.5906734441.

The spelling of 13075981 in words is "thirteen million, seventy-five thousand, nine hundred eighty-one".