139028279 has 8 divisors (see below), whose sum is σ = 149928240. Its totient is φ = 128157696.

The previous prime is 139028269. The next prime is 139028287. The reversal of 139028279 is 972820931.

It is a happy number.

139028279 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139028279 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 (139028269) 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, 3044 + ... + 16950.

It is an arithmetic number, because the mean of its divisors is an integer number (18741030).

Almost surely, 2^139028279 is an apocalyptic number.

139028279 is a deficient number, since it is larger than the sum of its proper divisors (10899961).

139028279 is a wasteful number, since it uses less digits than its factorization.

139028279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14689.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 139028279 is about 11791.0253582969. The cubic root of 139028279 is about 518.0452733942.

The spelling of 139028279 in words is "one hundred thirty-nine million, twenty-eight thousand, two hundred seventy-nine".