203949 has 24 divisors (see below), whose sum is σ = 329472. Its totient is φ = 120960.

The previous prime is 203947. The next prime is 203953. The reversal of 203949 is 949302.

It is not a de Polignac number, because 203949 - 2¹ = 203947 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4722 + ... + 4764.

It is an arithmetic number, because the mean of its divisors is an integer number (13728).

2²⁰³⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

203949 is a deficient number, since it is larger than the sum of its proper divisors (125523).

203949 is a wasteful number, since it uses less digits than its factorization.

203949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 203949 is about 451.6071301474. The cubic root of 203949 is about 58.8627471222.

It can be divided in two parts, 20 and 3949, that added together give a square (3969 = 63²).

The spelling of 203949 in words is "two hundred three thousand, nine hundred forty-nine".