137939 has 4 divisors (see below), whose sum is σ = 138720. Its totient is φ = 137160.

The previous prime is 137933. The next prime is 137941. The reversal of 137939 is 939731.

It is a happy number.

137939 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 brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 939731 = 13 ⋅72287.

It is a cyclic number.

It is not a de Polignac number, because 137939 - 2¹² = 133843 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (137933) 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, 17 + ... + 525.

It is an arithmetic number, because the mean of its divisors is an integer number (34680).

2¹³⁷⁹³⁹ is an apocalyptic number.

137939 is a deficient number, since it is larger than the sum of its proper divisors (781).

137939 is an equidigital number, since it uses as much as digits as its factorization.

137939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780.

The product of its digits is 5103, while the sum is 32.

The square root of 137939 is about 371.4014001051. The cubic root of 137939 is about 51.6688772323.

The spelling of 137939 in words is "one hundred thirty-seven thousand, nine hundred thirty-nine".