204250009 has 2 divisors, whose sum is σ = 204250010. Its totient is φ = 204250008.

The previous prime is 204249973. The next prime is 204250061. The reversal of 204250009 is 900052402.

It is a happy number.

204250009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163328400 + 40921609 = 12780^2 + 6397^2 .

It is a cyclic number.

It is not a de Polignac number, because 204250009 - 2¹¹ = 204247961 is a prime.

It is not a weakly prime, because it can be changed into another prime (204250609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102125004 + 102125005.

It is an arithmetic number, because the mean of its divisors is an integer number (102125005).

Almost surely, 2^204250009 is an apocalyptic number.

It is an amenable number.

204250009 is a deficient number, since it is larger than the sum of its proper divisors (1).

204250009 is an equidigital number, since it uses as much as digits as its factorization.

204250009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 204250009 is about 14291.6062428266. The cubic root of 204250009 is about 588.9169146123.

The spelling of 204250009 in words is "two hundred four million, two hundred fifty thousand, nine".