137239 has 2 divisors, whose sum is σ = 137240. Its totient is φ = 137238.

The previous prime is 137219. The next prime is 137251. The reversal of 137239 is 932731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137239 - 2⁹ = 136727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68619 + 68620.

It is an arithmetic number, because the mean of its divisors is an integer number (68620).

2¹³⁷²³⁹ is an apocalyptic number.

137239 is a deficient number, since it is larger than the sum of its proper divisors (1).

137239 is an equidigital number, since it uses as much as digits as its factorization.

137239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134, while the sum is 25.

The square root of 137239 is about 370.4578248600. The cubic root of 137239 is about 51.5813274985.

The spelling of 137239 in words is "one hundred thirty-seven thousand, two hundred thirty-nine".