139429871 has 24 divisors (see below), whose sum is σ = 166404096. Its totient is φ = 114413040.

The previous prime is 139429867. The next prime is 139429877. The reversal of 139429871 is 178924931.

It is not a de Polignac number, because 139429871 - 2² = 139429867 is a prime.

It is a Duffinian number.

Its product of digits (108864) is a multiple of the sum of its prime divisors (252).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139429877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1097810 + ... + 1097936.

It is an arithmetic number, because the mean of its divisors is an integer number (6933504).

Almost surely, 2^139429871 is an apocalyptic number.

139429871 is a deficient number, since it is larger than the sum of its proper divisors (26974225).

139429871 is an equidigital number, since it uses as much as digits as its factorization.

139429871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299 (or 252 counting only the distinct ones).

The product of its digits is 108864, while the sum is 44.

The square root of 139429871 is about 11808.0426405057. The cubic root of 139429871 is about 518.5435960971.

The spelling of 139429871 in words is "one hundred thirty-nine million, four hundred twenty-nine thousand, eight hundred seventy-one".