200921641 has 2 divisors, whose sum is σ = 200921642. Its totient is φ = 200921640.

The previous prime is 200921639. The next prime is 200921719. The reversal of 200921641 is 146129002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104960025 + 95961616 = 10245^2 + 9796^2 .

It is a cyclic number.

It is not a de Polignac number, because 200921641 - 2¹ = 200921639 is a prime.

It is a super-3 number, since 3×200921641³ (a number of 26 digits) contains 333 as substring.

Together with 200921639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (200921341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100460820 + 100460821.

It is an arithmetic number, because the mean of its divisors is an integer number (100460821).

Almost surely, 2^200921641 is an apocalyptic number.

It is an amenable number.

200921641 is a deficient number, since it is larger than the sum of its proper divisors (1).

200921641 is an equidigital number, since it uses as much as digits as its factorization.

200921641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 200921641 is about 14174.6831005141. The cubic root of 200921641 is about 585.7004695276.

The spelling of 200921641 in words is "two hundred million, nine hundred twenty-one thousand, six hundred forty-one".