139718671 has 4 divisors (see below), whose sum is σ = 139878144. Its totient is φ = 139559200.

The previous prime is 139718659. The next prime is 139718687. The reversal of 139718671 is 176817931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176817931 = 37 ⋅4778863.

It is a cyclic number.

It is not a de Polignac number, because 139718671 - 2⁷ = 139718543 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 (139718071) 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, 78415 + ... + 80176.

It is an arithmetic number, because the mean of its divisors is an integer number (34969536).

Almost surely, 2^139718671 is an apocalyptic number.

139718671 is a deficient number, since it is larger than the sum of its proper divisors (159473).

139718671 is an equidigital number, since it uses as much as digits as its factorization.

139718671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159472.

The product of its digits is 63504, while the sum is 43.

The square root of 139718671 is about 11820.2652677510. The cubic root of 139718671 is about 518.9013676243.

The spelling of 139718671 in words is "one hundred thirty-nine million, seven hundred eighteen thousand, six hundred seventy-one".