200847421 has 2 divisors, whose sum is σ = 200847422. Its totient is φ = 200847420.

The previous prime is 200847391. The next prime is 200847473. The reversal of 200847421 is 124748002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174530521 + 26316900 = 13211^2 + 5130^2 .

It is a cyclic number.

It is not a de Polignac number, because 200847421 - 2⁹ = 200846909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200847421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200847721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100423710 + 100423711.

It is an arithmetic number, because the mean of its divisors is an integer number (100423711).

Almost surely, 2^200847421 is an apocalyptic number.

It is an amenable number.

200847421 is a deficient number, since it is larger than the sum of its proper divisors (1).

200847421 is an equidigital number, since it uses as much as digits as its factorization.

200847421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 200847421 is about 14172.0648107465. The cubic root of 200847421 is about 585.6283418358.

The spelling of 200847421 in words is "two hundred million, eight hundred forty-seven thousand, four hundred twenty-one".