903 has 8 divisors (see below), whose sum is σ = 1408. Its totient is φ = 504.

The previous prime is 887. The next prime is 907. The reversal of 903 is 309.

903 is nontrivially palindromic in base 2.

903 is a nontrivial binomial coefficient, being equal to C(43, 2).

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

It is not a de Polignac number, because 903 - 2⁴ = 887 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

903 is a lucky number.

It is a nialpdrome in base 11 and base 12.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (907) 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, 1 + ... + 42.

It is an arithmetic number, because the mean of its divisors is an integer number (176).

903 is the 42-nd triangular number.

903 is a deficient number, since it is larger than the sum of its proper divisors (505).

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

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

The sum of its prime factors is 53.

The product of its (nonzero) digits is 27, while the sum is 12.

The square root of 903 is about 30.0499584026. The cubic root of 903 is about 9.6656096083.

The spelling of 903 in words is "nine hundred three", and thus it is an aban number and an oban number.