203050649 has 2 divisors, whose sum is σ = 203050650. Its totient is φ = 203050648.

The previous prime is 203050613. The next prime is 203050657. The reversal of 203050649 is 946050302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182439049 + 20611600 = 13507^2 + 4540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203050649 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_11238473 and since 203050649 and 11238473 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (203050249) 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, 101525324 + 101525325.

It is an arithmetic number, because the mean of its divisors is an integer number (101525325).

Almost surely, 2^203050649 is an apocalyptic number.

It is an amenable number.

203050649 is a deficient number, since it is larger than the sum of its proper divisors (1).

203050649 is an equidigital number, since it uses as much as digits as its factorization.

203050649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 203050649 is about 14249.5841693714. The cubic root of 203050649 is about 587.7619404757.

The spelling of 203050649 in words is "two hundred three million, fifty thousand, six hundred forty-nine".