203149 has 4 divisors (see below), whose sum is σ = 207036. Its totient is φ = 199264.

The previous prime is 203141. The next prime is 203173. The reversal of 203149 is 941302.

203149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 941302 = 2 ⋅470651.

It can be written as a sum of positive squares in 2 ways, for example, as 94249 + 108900 = 307^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 203149 - 2³ = 203141 is a prime.

It is a Duffinian number.

203149 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203141) 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, 1864 + ... + 1969.

It is an arithmetic number, because the mean of its divisors is an integer number (51759).

2²⁰³¹⁴⁹ is an apocalyptic number.

It is an amenable number.

203149 is a deficient number, since it is larger than the sum of its proper divisors (3887).

203149 is an equidigital number, since it uses as much as digits as its factorization.

203149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3886.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 203149 is about 450.7205342560. The cubic root of 203149 is about 58.7856822622.

It can be divided in two parts, 2031 and 49, that added together give a triangular number (2080 = T₆₄).

The spelling of 203149 in words is "two hundred three thousand, one hundred forty-nine".