408421543 has 2 divisors, whose sum is σ = 408421544. Its totient is φ = 408421542.

The previous prime is 408421499. The next prime is 408421579. The reversal of 408421543 is 345124804.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408421543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408421843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204210771 + 204210772.

It is an arithmetic number, because the mean of its divisors is an integer number (204210772).

Almost surely, 2^408421543 is an apocalyptic number.

408421543 is a deficient number, since it is larger than the sum of its proper divisors (1).

408421543 is an equidigital number, since it uses as much as digits as its factorization.

408421543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 408421543 is about 20209.4419269806. The cubic root of 408421543 is about 741.9413009994.

The spelling of 408421543 in words is "four hundred eight million, four hundred twenty-one thousand, five hundred forty-three".