13123903 has 4 divisors (see below), whose sum is σ = 14133448. Its totient is φ = 12114360.

The previous prime is 13123897. The next prime is 13123909. The reversal of 13123903 is 30932131.

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

It is an interprime number because it is at equal distance from previous prime (13123897) and next prime (13123909).

It is a cyclic number.

It is not a de Polignac number, because 13123903 - 2⁹ = 13123391 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 (13123909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504753 + ... + 504778.

It is an arithmetic number, because the mean of its divisors is an integer number (3533362).

Almost surely, 2^13123903 is an apocalyptic number.

13123903 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13123903 is a deficient number, since it is larger than the sum of its proper divisors (1009545).

13123903 is a wasteful number, since it uses less digits than its factorization.

13123903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009544.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 13123903 is about 3622.6927830000. The cubic root of 13123903 is about 235.8781270101.

The spelling of 13123903 in words is "thirteen million, one hundred twenty-three thousand, nine hundred three".