139192643 has 4 divisors (see below), whose sum is σ = 139287000. Its totient is φ = 139098288.

The previous prime is 139192639. The next prime is 139192649. The reversal of 139192643 is 346291931.

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

It is a cyclic number.

It is not a de Polignac number, because 139192643 - 2² = 139192639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139192597 and 139192606.

It is not an unprimeable number, because it can be changed into a prime (139192649) 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 in 3 ways as a sum of consecutive naturals, for example, 44930 + ... + 47927.

It is an arithmetic number, because the mean of its divisors is an integer number (34821750).

Almost surely, 2^139192643 is an apocalyptic number.

139192643 is a deficient number, since it is larger than the sum of its proper divisors (94357).

139192643 is an equidigital number, since it uses as much as digits as its factorization.

139192643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94356.

The product of its digits is 34992, while the sum is 38.

The square root of 139192643 is about 11797.9931768077. The cubic root of 139192643 is about 518.2493432928.

The spelling of 139192643 in words is "one hundred thirty-nine million, one hundred ninety-two thousand, six hundred forty-three".