543903421 has 4 divisors (see below), whose sum is σ = 547367932. Its totient is φ = 540438912.

The previous prime is 543903419. The next prime is 543903449. The reversal of 543903421 is 124309345.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 209525625 + 334377796 = 14475^2 + 18286^2 .

It is a cyclic number.

It is not a de Polignac number, because 543903421 - 2¹ = 543903419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543903461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1732020 + ... + 1732333.

It is an arithmetic number, because the mean of its divisors is an integer number (136841983).

Almost surely, 2^543903421 is an apocalyptic number.

It is an amenable number.

543903421 is a deficient number, since it is larger than the sum of its proper divisors (3464511).

543903421 is a wasteful number, since it uses less digits than its factorization.

543903421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3464510.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 543903421 is about 23321.7370922494. The cubic root of 543903421 is about 816.2827084351.

The spelling of 543903421 in words is "five hundred forty-three million, nine hundred three thousand, four hundred twenty-one".