139639143 has 8 divisors (see below), whose sum is σ = 212783488. Its totient is φ = 79793784.

The previous prime is 139639127. The next prime is 139639169. The reversal of 139639143 is 341936931.

139639143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 139639143 - 2⁴ = 139639127 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 (139639183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3324721 + ... + 3324762.

It is an arithmetic number, because the mean of its divisors is an integer number (26597936).

Almost surely, 2^139639143 is an apocalyptic number.

139639143 is a deficient number, since it is larger than the sum of its proper divisors (73144345).

139639143 is an equidigital number, since it uses as much as digits as its factorization.

139639143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6649493.

The product of its digits is 52488, while the sum is 39.

The square root of 139639143 is about 11816.9007358106. The cubic root of 139639143 is about 518.8028958884.

The spelling of 139639143 in words is "one hundred thirty-nine million, six hundred thirty-nine thousand, one hundred forty-three".