203753312449 has 2 divisors, whose sum is σ = 203753312450. Its totient is φ = 203753312448.

The previous prime is 203753312417. The next prime is 203753312453. The reversal of 203753312449 is 944213357302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127374041025 + 76379271424 = 356895^2 + 276368^2 .

It is a cyclic number.

It is not a de Polignac number, because 203753312449 - 2⁵ = 203753312417 is a prime.

It is not a weakly prime, because it can be changed into another prime (203753318449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101876656224 + 101876656225.

It is an arithmetic number, because the mean of its divisors is an integer number (101876656225).

Almost surely, 2^203753312449 is an apocalyptic number.

It is an amenable number.

203753312449 is a deficient number, since it is larger than the sum of its proper divisors (1).

203753312449 is an equidigital number, since it uses as much as digits as its factorization.

203753312449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 43.

The spelling of 203753312449 in words is "two hundred three billion, seven hundred fifty-three million, three hundred twelve thousand, four hundred forty-nine".