139105643 has 2 divisors, whose sum is σ = 139105644. Its totient is φ = 139105642.

The previous prime is 139105639. The next prime is 139105693. The reversal of 139105643 is 346501931.

It is a weak prime.

It is an emirp because it is prime and its reverse (346501931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139105643 - 2² = 139105639 is a prime.

It is not a weakly prime, because it can be changed into another prime (139105693) 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, 69552821 + 69552822.

It is an arithmetic number, because the mean of its divisors is an integer number (69552822).

Almost surely, 2^139105643 is an apocalyptic number.

139105643 is a deficient number, since it is larger than the sum of its proper divisors (1).

139105643 is an equidigital number, since it uses as much as digits as its factorization.

139105643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 139105643 is about 11794.3055327561. The cubic root of 139105643 is about 518.1413464693.

The spelling of 139105643 in words is "one hundred thirty-nine million, one hundred five thousand, six hundred forty-three".