203020049 has 2 divisors, whose sum is σ = 203020050. Its totient is φ = 203020048.

The previous prime is 203020043. The next prime is 203020061. The reversal of 203020049 is 940020302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146289025 + 56731024 = 12095^2 + 7532^2 .

It is a cyclic number.

It is not a de Polignac number, because 203020049 - 2⁸ = 203019793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203020049.

It is not a weakly prime, because it can be changed into another prime (203020043) 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, 101510024 + 101510025.

It is an arithmetic number, because the mean of its divisors is an integer number (101510025).

Almost surely, 2^203020049 is an apocalyptic number.

It is an amenable number.

203020049 is a deficient number, since it is larger than the sum of its proper divisors (1).

203020049 is an equidigital number, since it uses as much as digits as its factorization.

203020049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 203020049 is about 14248.5104133730. The cubic root of 203020049 is about 587.7324134931.

The spelling of 203020049 in words is "two hundred three million, twenty thousand, forty-nine".