139439625007 has 4 divisors (see below), whose sum is σ = 139458167640. Its totient is φ = 139421082376.

The previous prime is 139439624959. The next prime is 139439625019. The reversal of 139439625007 is 700526934931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 700526934931 = 449 ⋅1560193619.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139439625007 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139439625037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9260032 + ... + 9275077.

It is an arithmetic number, because the mean of its divisors is an integer number (34864541910).

Almost surely, 2^139439625007 is an apocalyptic number.

139439625007 is a deficient number, since it is larger than the sum of its proper divisors (18542633).

139439625007 is an equidigital number, since it uses as much as digits as its factorization.

139439625007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18542632.

The product of its (nonzero) digits is 1224720, while the sum is 49.

The spelling of 139439625007 in words is "one hundred thirty-nine billion, four hundred thirty-nine million, six hundred twenty-five thousand, seven".