139708789 has 4 divisors (see below), whose sum is σ = 152409600. Its totient is φ = 127007980.

The previous prime is 139708733. The next prime is 139708813. The reversal of 139708789 is 987807931.

139708789 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 987807931 = 11 ⋅89800721.

It is not a de Polignac number, because 139708789 - 2²¹ = 137611637 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 (139708589) 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, 6350389 + ... + 6350410.

It is an arithmetic number, because the mean of its divisors is an integer number (38102400).

Almost surely, 2^139708789 is an apocalyptic number.

It is an amenable number.

139708789 is a deficient number, since it is larger than the sum of its proper divisors (12700811).

139708789 is a wasteful number, since it uses less digits than its factorization.

139708789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12700810.

The product of its (nonzero) digits is 762048, while the sum is 52.

The square root of 139708789 is about 11819.8472494360. The cubic root of 139708789 is about 518.8891337446.

The spelling of 139708789 in words is "one hundred thirty-nine million, seven hundred eight thousand, seven hundred eighty-nine".