203129 has 4 divisors (see below), whose sum is σ = 213840. Its totient is φ = 192420.

The previous prime is 203117. The next prime is 203141. The reversal of 203129 is 921302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (203117) and next prime (203141).

It is a cyclic number.

It is not a de Polignac number, because 203129 - 2¹² = 199033 is a prime.

It is a super-2 number, since 2×203129² = 82522781282, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 203129.

It is not an unprimeable number, because it can be changed into a prime (203429) 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, 5327 + ... + 5364.

It is an arithmetic number, because the mean of its divisors is an integer number (53460).

2²⁰³¹²⁹ is an apocalyptic number.

It is an amenable number.

203129 is a deficient number, since it is larger than the sum of its proper divisors (10711).

203129 is a wasteful number, since it uses less digits than its factorization.

203129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10710.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 203129 is about 450.6983470127. The cubic root of 203129 is about 58.7837530505.

The spelling of 203129 in words is "two hundred three thousand, one hundred twenty-nine".