203944493 has 2 divisors, whose sum is σ = 203944494. Its totient is φ = 203944492.

The previous prime is 203944471. The next prime is 203944511. The reversal of 203944493 is 394449302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109893289 + 94051204 = 10483^2 + 9698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203944493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203944453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101972246 + 101972247.

It is an arithmetic number, because the mean of its divisors is an integer number (101972247).

Almost surely, 2^203944493 is an apocalyptic number.

It is an amenable number.

203944493 is a deficient number, since it is larger than the sum of its proper divisors (1).

203944493 is an equidigital number, since it uses as much as digits as its factorization.

203944493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 203944493 is about 14280.9135912238. The cubic root of 203944493 is about 588.6231352303.

The spelling of 203944493 in words is "two hundred three million, nine hundred forty-four thousand, four hundred ninety-three".