139627679 has 4 divisors (see below), whose sum is σ = 139979784. Its totient is φ = 139275576.

The previous prime is 139627651. The next prime is 139627699. The reversal of 139627679 is 976726931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976726931 = 29 ⋅33680239.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139627679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139627639) 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, 175457 + ... + 176250.

It is an arithmetic number, because the mean of its divisors is an integer number (34994946).

Almost surely, 2^139627679 is an apocalyptic number.

139627679 is a deficient number, since it is larger than the sum of its proper divisors (352105).

139627679 is an equidigital number, since it uses as much as digits as its factorization.

139627679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352104.

The product of its digits is 857304, while the sum is 50.

The square root of 139627679 is about 11816.4156578888. The cubic root of 139627679 is about 518.7886980566.

The spelling of 139627679 in words is "one hundred thirty-nine million, six hundred twenty-seven thousand, six hundred seventy-nine".