203400993 has 8 divisors (see below), whose sum is σ = 271788928. Its totient is φ = 135306864.

The previous prime is 203400991. The next prime is 203400997. The reversal of 203400993 is 399004302.

203400993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 203400993 - 2¹ = 203400991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203400993.

It is not an unprimeable number, because it can be changed into a prime (203400991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71830 + ... + 74607.

It is an arithmetic number, because the mean of its divisors is an integer number (33973616).

Almost surely, 2^203400993 is an apocalyptic number.

It is an amenable number.

203400993 is a deficient number, since it is larger than the sum of its proper divisors (68387935).

203400993 is a wasteful number, since it uses less digits than its factorization.

203400993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146903.

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

The square root of 203400993 is about 14261.8720019498. The cubic root of 203400993 is about 588.0997881223.

The spelling of 203400993 in words is "two hundred three million, four hundred thousand, nine hundred ninety-three".