203401993 has 2 divisors, whose sum is σ = 203401994. Its totient is φ = 203401992.

The previous prime is 203401963. The next prime is 203402033. The reversal of 203401993 is 399104302.

203401993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176278729 + 27123264 = 13277^2 + 5208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203401993 is a prime.

It is not a weakly prime, because it can be changed into another prime (203401963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101700996 + 101700997.

It is an arithmetic number, because the mean of its divisors is an integer number (101700997).

Almost surely, 2^203401993 is an apocalyptic number.

It is an amenable number.

203401993 is a deficient number, since it is larger than the sum of its proper divisors (1).

203401993 is an equidigital number, since it uses as much as digits as its factorization.

203401993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 203401993 is about 14261.9070604180. The cubic root of 203401993 is about 588.1007518980.

The spelling of 203401993 in words is "two hundred three million, four hundred one thousand, nine hundred ninety-three".