139017789 has 20 divisors (see below), whose sum is σ = 219886524. Its totient is φ = 87225984.

The previous prime is 139017763. The next prime is 139017797. The reversal of 139017789 is 987710931.

139017789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 109369764 + 29648025 = 10458^2 + 5445^2 .

It is not a de Polignac number, because 139017789 - 2⁸ = 139017533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139017799) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49102 + ... + 51855.

Almost surely, 2^139017789 is an apocalyptic number.

It is an amenable number.

139017789 is a deficient number, since it is larger than the sum of its proper divisors (80868735).

139017789 is a wasteful number, since it uses less digits than its factorization.

139017789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100986 (or 100977 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 45.

The square root of 139017789 is about 11790.5805200592. The cubic root of 139017789 is about 518.0322438350.

The spelling of 139017789 in words is "one hundred thirty-nine million, seventeen thousand, seven hundred eighty-nine".