139842859 has 4 divisors (see below), whose sum is σ = 150600016. Its totient is φ = 129085704.

The previous prime is 139842847. The next prime is 139842889. The reversal of 139842859 is 958248931.

139842859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 958248931 = 23 ⋅41662997.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139842859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139842809) 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, 5378559 + ... + 5378584.

It is an arithmetic number, because the mean of its divisors is an integer number (37650004).

Almost surely, 2^139842859 is an apocalyptic number.

139842859 is a deficient number, since it is larger than the sum of its proper divisors (10757157).

139842859 is a wasteful number, since it uses less digits than its factorization.

139842859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10757156.

The product of its digits is 622080, while the sum is 49.

The square root of 139842859 is about 11825.5172825547. The cubic root of 139842859 is about 519.0550627586.

The spelling of 139842859 in words is "one hundred thirty-nine million, eight hundred forty-two thousand, eight hundred fifty-nine".