139871339 has 4 divisors (see below), whose sum is σ = 140451960. Its totient is φ = 139290720.

The previous prime is 139871327. The next prime is 139871341. The reversal of 139871339 is 933178931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139871339 - 2¹² = 139867243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139871339.

It is not an unprimeable number, because it can be changed into a prime (139871309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289949 + ... + 290430.

It is an arithmetic number, because the mean of its divisors is an integer number (35112990).

Almost surely, 2^139871339 is an apocalyptic number.

139871339 is a deficient number, since it is larger than the sum of its proper divisors (580621).

139871339 is an equidigital number, since it uses as much as digits as its factorization.

139871339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580620.

The product of its digits is 122472, while the sum is 44.

The square root of 139871339 is about 11826.7213969046. The cubic root of 139871339 is about 519.0902967941.

The spelling of 139871339 in words is "one hundred thirty-nine million, eight hundred seventy-one thousand, three hundred thirty-nine".