201000649 has 2 divisors, whose sum is σ = 201000650. Its totient is φ = 201000648.

The previous prime is 201000641. The next prime is 201000659. The reversal of 201000649 is 946000102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146240649 + 54760000 = 12093^2 + 7400^2 .

It is a cyclic number.

It is not a de Polignac number, because 201000649 - 2³ = 201000641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201000641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500324 + 100500325.

It is an arithmetic number, because the mean of its divisors is an integer number (100500325).

Almost surely, 2^201000649 is an apocalyptic number.

It is an amenable number.

201000649 is a deficient number, since it is larger than the sum of its proper divisors (1).

201000649 is an equidigital number, since it uses as much as digits as its factorization.

201000649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 201000649 is about 14177.4697672046. The cubic root of 201000649 is about 585.7772307271. Note that the first 3 decimals are identical.

The spelling of 201000649 in words is "two hundred one million, six hundred forty-nine", and thus it is an aban number.