13553903 has 12 divisors (see below), whose sum is σ = 15176184. Its totient is φ = 12004800.

The previous prime is 13553867. The next prime is 13553909. The reversal of 13553903 is 30935531.

It is not a de Polignac number, because 13553903 - 2¹⁰ = 13552879 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 (13553909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18125 + ... + 18857.

It is an arithmetic number, because the mean of its divisors is an integer number (1264682).

Almost surely, 2^13553903 is an apocalyptic number.

13553903 is a deficient number, since it is larger than the sum of its proper divisors (1622281).

13553903 is an equidigital number, since it uses as much as digits as its factorization.

13553903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826 (or 785 counting only the distinct ones).

The product of its (nonzero) digits is 6075, while the sum is 29.

The square root of 13553903 is about 3681.5625758637. The cubic root of 13553903 is about 238.4266468627.

The spelling of 13553903 in words is "thirteen million, five hundred fifty-three thousand, nine hundred three".