13172903 has 4 divisors (see below), whose sum is σ = 13208040. Its totient is φ = 13137768.

The previous prime is 13172897. The next prime is 13172911. The reversal of 13172903 is 30927131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13172903 - 2⁶ = 13172839 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 (13172953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17000 + ... + 17757.

It is an arithmetic number, because the mean of its divisors is an integer number (3302010).

Almost surely, 2^13172903 is an apocalyptic number.

13172903 is a deficient number, since it is larger than the sum of its proper divisors (35137).

13172903 is an equidigital number, since it uses as much as digits as its factorization.

13172903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35136.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 13172903 is about 3629.4494072793. The cubic root of 13172903 is about 236.1713241751.

The spelling of 13172903 in words is "thirteen million, one hundred seventy-two thousand, nine hundred three".