139952671 has 8 divisors (see below), whose sum is σ = 141343488. Its totient is φ = 138567000.

The previous prime is 139952669. The next prime is 139952707. The reversal of 139952671 is 176259931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 3-Lehmer number, since φ(139952671) divides (139952671-1)³.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 139952671 - 2¹ = 139952669 is a prime.

It is a deceptive number, since it divides R_139952670.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139952641) 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 7 ways as a sum of consecutive naturals, for example, 73866 + ... + 75736.

It is an arithmetic number, because the mean of its divisors is an integer number (17667936).

It is a Poulet number, since it divides 2^139952670-1.

Almost surely, 2^139952671 is an apocalyptic number.

139952671 is a deficient number, since it is larger than the sum of its proper divisors (1390817).

139952671 is a wasteful number, since it uses less digits than its factorization.

139952671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573.

The product of its digits is 102060, while the sum is 43.

The square root of 139952671 is about 11830.1593818511. The cubic root of 139952671 is about 519.1908903631.

The spelling of 139952671 in words is "one hundred thirty-nine million, nine hundred fifty-two thousand, six hundred seventy-one".