138277 has 4 divisors (see below), whose sum is σ = 140940. Its totient is φ = 135616.

The previous prime is 138251. The next prime is 138283. The reversal of 138277 is 772831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 772831 = 197 ⋅3923.

It can be written as a sum of positive squares in 2 ways, for example, as 83521 + 54756 = 289^2 + 234^2 .

It is a cyclic number.

It is not a de Polignac number, because 138277 - 2¹⁵ = 105509 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 (138247) 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 in 3 ways as a sum of consecutive naturals, for example, 1252 + ... + 1357.

It is an arithmetic number, because the mean of its divisors is an integer number (35235).

2¹³⁸²⁷⁷ is an apocalyptic number.

It is an amenable number.

138277 is a deficient number, since it is larger than the sum of its proper divisors (2663).

138277 is an equidigital number, since it uses as much as digits as its factorization.

138277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662.

The product of its digits is 2352, while the sum is 28.

The square root of 138277 is about 371.8561549847. The cubic root of 138277 is about 51.7110452328.

It can be divided in two parts, 138 and 277, that multiplied together give a triangular number (38226 = T₂₇₆).

The spelling of 138277 in words is "one hundred thirty-eight thousand, two hundred seventy-seven".