200403421 has 2 divisors, whose sum is σ = 200403422. Its totient is φ = 200403420.

The previous prime is 200403397. The next prime is 200403443. The reversal of 200403421 is 124304002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163558521 + 36844900 = 12789^2 + 6070^2 .

It is a cyclic number.

It is not a de Polignac number, because 200403421 - 2¹³ = 200395229 is a prime.

It is a super-2 number, since 2×200403421² = 80323062297006482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 200403395 and 200403404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200403461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100201710 + 100201711.

It is an arithmetic number, because the mean of its divisors is an integer number (100201711).

Almost surely, 2^200403421 is an apocalyptic number.

It is an amenable number.

200403421 is a deficient number, since it is larger than the sum of its proper divisors (1).

200403421 is an equidigital number, since it uses as much as digits as its factorization.

200403421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 200403421 is about 14156.3915246789. The cubic root of 200403421 is about 585.1964869476.

Adding to 200403421 its reverse (124304002), we get a palindrome (324707423).

The spelling of 200403421 in words is "two hundred million, four hundred three thousand, four hundred twenty-one".