200605649 has 2 divisors, whose sum is σ = 200605650. Its totient is φ = 200605648.

The previous prime is 200605607. The next prime is 200605709. The reversal of 200605649 is 946506002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186595600 + 14010049 = 13660^2 + 3743^2 .

It is a cyclic number.

It is not a de Polignac number, because 200605649 - 2¹² = 200601553 is a prime.

It is a super-2 number, since 2×200605649² = 80485252821422402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (200655649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100302824 + 100302825.

It is an arithmetic number, because the mean of its divisors is an integer number (100302825).

Almost surely, 2^200605649 is an apocalyptic number.

It is an amenable number.

200605649 is a deficient number, since it is larger than the sum of its proper divisors (1).

200605649 is an equidigital number, since it uses as much as digits as its factorization.

200605649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 200605649 is about 14163.5323630795. The cubic root of 200605649 is about 585.3932622488.

The spelling of 200605649 in words is "two hundred million, six hundred five thousand, six hundred forty-nine".