13491073 has 2 divisors, whose sum is σ = 13491074. Its totient is φ = 13491072.

The previous prime is 13491029. The next prime is 13491089. The reversal of 13491073 is 37019431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13490929 + 144 = 3673^2 + 12^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13491073 is a prime.

It is not a weakly prime, because it can be changed into another prime (13497073) 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 as a sum of consecutive naturals, namely, 6745536 + 6745537.

It is an arithmetic number, because the mean of its divisors is an integer number (6745537).

Almost surely, 2^13491073 is an apocalyptic number.

It is an amenable number.

13491073 is a deficient number, since it is larger than the sum of its proper divisors (1).

13491073 is an equidigital number, since it uses as much as digits as its factorization.

13491073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 13491073 is about 3673.0196024525. The cubic root of 13491073 is about 238.0576620402.

The spelling of 13491073 in words is "thirteen million, four hundred ninety-one thousand, seventy-three".