203923317 has 16 divisors (see below), whose sum is σ = 300728960. Its totient is φ = 122098752.

The previous prime is 203923283. The next prime is 203923327. The reversal of 203923317 is 713329302.

It is not a de Polignac number, because 203923317 - 2¹⁵ = 203890549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203923327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69217 + ... + 72102.

It is an arithmetic number, because the mean of its divisors is an integer number (18795560).

Almost surely, 2^203923317 is an apocalyptic number.

It is an amenable number.

203923317 is a deficient number, since it is larger than the sum of its proper divisors (96805643).

203923317 is a wasteful number, since it uses less digits than its factorization.

203923317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141372.

The product of its (nonzero) digits is 6804, while the sum is 30.

The square root of 203923317 is about 14280.1721628277. The cubic root of 203923317 is about 588.6027618520.

The spelling of 203923317 in words is "two hundred three million, nine hundred twenty-three thousand, three hundred seventeen".