203992993 has 2 divisors, whose sum is σ = 203992994. Its totient is φ = 203992992.

The previous prime is 203992991. The next prime is 203993017. The reversal of 203992993 is 399299302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124925329 + 79067664 = 11177^2 + 8892^2 .

It is a cyclic number.

It is not a de Polignac number, because 203992993 - 2¹ = 203992991 is a prime.

It is a super-2 number, since 2×203992993² = 83226282386196098, which contains 22 as substring.

Together with 203992991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (203992991) 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 as a sum of consecutive naturals, namely, 101996496 + 101996497.

It is an arithmetic number, because the mean of its divisors is an integer number (101996497).

Almost surely, 2^203992993 is an apocalyptic number.

It is an amenable number.

203992993 is a deficient number, since it is larger than the sum of its proper divisors (1).

203992993 is an equidigital number, since it uses as much as digits as its factorization.

203992993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 46.

The square root of 203992993 is about 14282.6115609156. The cubic root of 203992993 is about 588.6697916496.

It can be divided in two parts, 20399299 and 3, that added together give a palindrome (20399302).

The spelling of 203992993 in words is "two hundred three million, nine hundred ninety-two thousand, nine hundred ninety-three".