203987 has 12 divisors (see below), whose sum is σ = 248976. Its totient is φ = 166320.

The previous prime is 203977. The next prime is 203989. The reversal of 203987 is 789302.

203987 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 203987 - 2⁴ = 203971 is a prime.

It is a super-2 number, since 2×203987² = 83221392338, which contains 22 as substring.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 203987.

It is not an unprimeable number, because it can be changed into a prime (203989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1037 + ... + 1217.

It is an arithmetic number, because the mean of its divisors is an integer number (20748).

2²⁰³⁹⁸⁷ is an apocalyptic number.

203987 is a deficient number, since it is larger than the sum of its proper divisors (44989).

203987 is a wasteful number, since it uses less digits than its factorization.

203987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 203987 is about 451.6492001543. The cubic root of 203987 is about 58.8664026856.

The spelling of 203987 in words is "two hundred three thousand, nine hundred eighty-seven".