5543421391 has 2 divisors, whose sum is σ = 5543421392. Its totient is φ = 5543421390.

The previous prime is 5543421379. The next prime is 5543421419. The reversal of 5543421391 is 1931243455.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5543421391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5543421391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5543421691) 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, 2771710695 + 2771710696.

It is an arithmetic number, because the mean of its divisors is an integer number (2771710696).

Almost surely, 2^5543421391 is an apocalyptic number.

5543421391 is a deficient number, since it is larger than the sum of its proper divisors (1).

5543421391 is an equidigital number, since it uses as much as digits as its factorization.

5543421391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 37.

The square root of 5543421391 is about 74454.1563043998. The cubic root of 5543421391 is about 1769.8072279871.

The spelling of 5543421391 in words is "five billion, five hundred forty-three million, four hundred twenty-one thousand, three hundred ninety-one".