203942385 has 12 divisors (see below), whose sum is σ = 353500212. Its totient is φ = 108769248.

The previous prime is 203942383. The next prime is 203942399. The reversal of 203942385 is 583249302.

It can be written as a sum of positive squares in 2 ways, for example, as 91412721 + 112529664 = 9561^2 + 10608^2 .

It is not a de Polignac number, because 203942385 - 2¹ = 203942383 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (203942383) 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, 2265982 + ... + 2266071.

It is an arithmetic number, because the mean of its divisors is an integer number (29458351).

Almost surely, 2^203942385 is an apocalyptic number.

It is an amenable number.

203942385 is a deficient number, since it is larger than the sum of its proper divisors (149557827).

203942385 is a wasteful number, since it uses less digits than its factorization.

203942385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4532064 (or 4532061 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 203942385 is about 14280.8397862311. The cubic root of 203942385 is about 588.6211071918.

The spelling of 203942385 in words is "two hundred three million, nine hundred forty-two thousand, three hundred eighty-five".