137439 has 6 divisors (see below), whose sum is σ = 198536. Its totient is φ = 91620.

The previous prime is 137437. The next prime is 137443. The reversal of 137439 is 934731.

It is not a de Polignac number, because 137439 - 2¹ = 137437 is a prime.

It is a d-powerful number, because it can be written as 1 + 3⁴ + 4² + 7⁶ + 3⁹ + 9 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7627 + ... + 7644.

2¹³⁷⁴³⁹ is an apocalyptic number.

137439 is a deficient number, since it is larger than the sum of its proper divisors (61097).

137439 is a wasteful number, since it uses less digits than its factorization.

137439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15277 (or 15274 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 137439 is about 370.7276628470. The cubic root of 137439 is about 51.6063720272.

It can be divided in two parts, 137 and 439, that added together give a square (576 = 24²).

The spelling of 137439 in words is "one hundred thirty-seven thousand, four hundred thirty-nine".