203209993 has 8 divisors (see below), whose sum is σ = 245901312. Its totient is φ = 163934016.

The previous prime is 203209987. The next prime is 203210009. The reversal of 203209993 is 399902302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203209993 - 2⁵ = 203209961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203209933) 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 7 ways as a sum of consecutive naturals, for example, 853705 + ... + 853942.

It is an arithmetic number, because the mean of its divisors is an integer number (30737664).

Almost surely, 2^203209993 is an apocalyptic number.

It is an amenable number.

203209993 is a deficient number, since it is larger than the sum of its proper divisors (42691319).

203209993 is a wasteful number, since it uses less digits than its factorization.

203209993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707671.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 203209993 is about 14255.1742535825. The cubic root of 203209993 is about 587.9156490058.

The spelling of 203209993 in words is "two hundred three million, two hundred nine thousand, nine hundred ninety-three".