203873 has 2 divisors, whose sum is σ = 203874. Its totient is φ = 203872.

The previous prime is 203869. The next prime is 203897. The reversal of 203873 is 378302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187489 + 16384 = 433^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 203873 - 2² = 203869 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₁₈₂₉₃ and since 203873 and 18293 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (203843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101936 + 101937.

It is an arithmetic number, because the mean of its divisors is an integer number (101937).

2²⁰³⁸⁷³ is an apocalyptic number.

It is an amenable number.

203873 is a deficient number, since it is larger than the sum of its proper divisors (1).

203873 is an equidigital number, since it uses as much as digits as its factorization.

203873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 203873 is about 451.5229783743. The cubic root of 203873 is about 58.8554346330.

The spelling of 203873 in words is "two hundred three thousand, eight hundred seventy-three".