139055871 has 8 divisors (see below), whose sum is σ = 187208320. Its totient is φ = 91803672.

The previous prime is 139055867. The next prime is 139055881. The reversal of 139055871 is 178550931.

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

It is not a de Polignac number, because 139055871 - 2² = 139055867 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 (139055881) 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, 224701 + ... + 225318.

It is an arithmetic number, because the mean of its divisors is an integer number (23401040).

Almost surely, 2^139055871 is an apocalyptic number.

139055871 is a deficient number, since it is larger than the sum of its proper divisors (48152449).

139055871 is a wasteful number, since it uses less digits than its factorization.

139055871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450125.

The product of its (nonzero) digits is 37800, while the sum is 39.

The square root of 139055871 is about 11792.1953426832. The cubic root of 139055871 is about 518.0795421051.

The spelling of 139055871 in words is "one hundred thirty-nine million, fifty-five thousand, eight hundred seventy-one".