139321543 has 2 divisors, whose sum is σ = 139321544. Its totient is φ = 139321542.

The previous prime is 139321531. The next prime is 139321561. The reversal of 139321543 is 345123931.

It is a weak prime.

It is an emirp because it is prime and its reverse (345123931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139321543 - 2⁹ = 139321031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139321043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69660771 + 69660772.

It is an arithmetic number, because the mean of its divisors is an integer number (69660772).

Almost surely, 2^139321543 is an apocalyptic number.

139321543 is a deficient number, since it is larger than the sum of its proper divisors (1).

139321543 is an equidigital number, since it uses as much as digits as its factorization.

139321543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 31.

The square root of 139321543 is about 11803.4547061443. The cubic root of 139321543 is about 518.4092696812.

The spelling of 139321543 in words is "one hundred thirty-nine million, three hundred twenty-one thousand, five hundred forty-three".