203040399 has 4 divisors (see below), whose sum is σ = 270720536. Its totient is φ = 135360264.

The previous prime is 203040379. The next prime is 203040413. The reversal of 203040399 is 993040302.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 203040399 - 2⁸ = 203040143 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 (203040379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33840064 + ... + 33840069.

It is an arithmetic number, because the mean of its divisors is an integer number (67680134).

Almost surely, 2^203040399 is an apocalyptic number.

203040399 is a deficient number, since it is larger than the sum of its proper divisors (67680137).

203040399 is an equidigital number, since it uses as much as digits as its factorization.

203040399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67680136.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 203040399 is about 14249.2245052143. The cubic root of 203040399 is about 587.7520502319.

The spelling of 203040399 in words is "two hundred three million, forty thousand, three hundred ninety-nine".