200840657 has 2 divisors, whose sum is σ = 200840658. Its totient is φ = 200840656.

The previous prime is 200840597. The next prime is 200840671. The reversal of 200840657 is 756048002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179533201 + 21307456 = 13399^2 + 4616^2 .

It is a cyclic number.

It is not a de Polignac number, because 200840657 - 2¹² = 200836561 is a prime.

It is not a weakly prime, because it can be changed into another prime (200840257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100420328 + 100420329.

It is an arithmetic number, because the mean of its divisors is an integer number (100420329).

Almost surely, 2^200840657 is an apocalyptic number.

It is an amenable number.

200840657 is a deficient number, since it is larger than the sum of its proper divisors (1).

200840657 is an equidigital number, since it uses as much as digits as its factorization.

200840657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 200840657 is about 14171.8261702577. The cubic root of 200840657 is about 585.6217676338.

Adding to 200840657 its reverse (756048002), we get a palindrome (956888659).

The spelling of 200840657 in words is "two hundred million, eight hundred forty thousand, six hundred fifty-seven".