203643049 has 2 divisors, whose sum is σ = 203643050. Its totient is φ = 203643048.

The previous prime is 203643001. The next prime is 203643053. The reversal of 203643049 is 940346302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193015449 + 10627600 = 13893^2 + 3260^2 .

It is a cyclic number.

It is not a de Polignac number, because 203643049 - 2¹⁷ = 203511977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203643049.

It is not a weakly prime, because it can be changed into another prime (203643749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101821524 + 101821525.

It is an arithmetic number, because the mean of its divisors is an integer number (101821525).

Almost surely, 2^203643049 is an apocalyptic number.

It is an amenable number.

203643049 is a deficient number, since it is larger than the sum of its proper divisors (1).

203643049 is an equidigital number, since it uses as much as digits as its factorization.

203643049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 203643049 is about 14270.3556017361. The cubic root of 203643049 is about 588.3329837240.

The spelling of 203643049 in words is "two hundred three million, six hundred forty-three thousand, forty-nine".