139789 has 4 divisors (see below), whose sum is σ = 150556. Its totient is φ = 129024.

The previous prime is 139787. The next prime is 139801. The reversal of 139789 is 987931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81225 + 58564 = 285^2 + 242^2 .

It is a cyclic number.

It is not a de Polignac number, because 139789 - 2¹ = 139787 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 (139787) 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, 5364 + ... + 5389.

It is an arithmetic number, because the mean of its divisors is an integer number (37639).

2¹³⁹⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

139789 is a deficient number, since it is larger than the sum of its proper divisors (10767).

139789 is a wasteful number, since it uses less digits than its factorization.

139789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10766.

The product of its digits is 13608, while the sum is 37.

The square root of 139789 is about 373.8836717483. The cubic root of 139789 is about 51.8988418010.

The spelling of 139789 in words is "one hundred thirty-nine thousand, seven hundred eighty-nine".