13481309 has 2 divisors, whose sum is σ = 13481310. Its totient is φ = 13481308.

The previous prime is 13481287. The next prime is 13481327. The reversal of 13481309 is 90318431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13344409 + 136900 = 3653^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 13481309 - 2⁸ = 13481053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13481329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6740654 + 6740655.

It is an arithmetic number, because the mean of its divisors is an integer number (6740655).

Almost surely, 2^13481309 is an apocalyptic number.

It is an amenable number.

13481309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13481309 is an equidigital number, since it uses as much as digits as its factorization.

13481309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 13481309 is about 3671.6902102438. The cubic root of 13481309 is about 238.0002177340. Note that the first 3 decimals are identical.

The spelling of 13481309 in words is "thirteen million, four hundred eighty-one thousand, three hundred nine".