13081903 has 2 divisors, whose sum is σ = 13081904. Its totient is φ = 13081902.

The previous prime is 13081841. The next prime is 13081909. The reversal of 13081903 is 30918031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13081903 - 2¹⁷ = 12950831 is a prime.

It is a super-2 number, since 2×13081903² = 342272372202818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13081909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6540951 + 6540952.

It is an arithmetic number, because the mean of its divisors is an integer number (6540952).

Almost surely, 2^13081903 is an apocalyptic number.

13081903 is a deficient number, since it is larger than the sum of its proper divisors (1).

13081903 is an equidigital number, since it uses as much as digits as its factorization.

13081903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 13081903 is about 3616.8913447877. The cubic root of 13081903 is about 235.6262337436.

Adding to 13081903 its reverse (30918031), we get a palindrome (43999934).

The spelling of 13081903 in words is "thirteen million, eighty-one thousand, nine hundred three".