13009903 has 8 divisors (see below), whose sum is σ = 13426160. Its totient is φ = 12597120.

The previous prime is 13009901. The next prime is 13009907. The reversal of 13009903 is 30990031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13009903 - 2¹ = 13009901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13009901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8188 + ... + 9646.

It is an arithmetic number, because the mean of its divisors is an integer number (1678270).

Almost surely, 2^13009903 is an apocalyptic number.

13009903 is a deficient number, since it is larger than the sum of its proper divisors (416257).

13009903 is a wasteful number, since it uses less digits than its factorization.

13009903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737.

The product of its (nonzero) digits is 729, while the sum is 25.

The square root of 13009903 is about 3606.9243130401. The cubic root of 13009903 is about 235.1931594317.

Adding to 13009903 its reverse (30990031), we get a palindrome (43999934).

The spelling of 13009903 in words is "thirteen million, nine thousand, nine hundred three".