138297 has 4 divisors (see below), whose sum is σ = 184400. Its totient is φ = 92196.

The previous prime is 138289. The next prime is 138311. The reversal of 138297 is 792831.

138297 = 79² + 80² + ... + 96².

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 138297 - 2³ = 138289 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138247) 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, 23047 + ... + 23052.

It is an arithmetic number, because the mean of its divisors is an integer number (46100).

2¹³⁸²⁹⁷ is an apocalyptic number.

It is an amenable number.

138297 is a deficient number, since it is larger than the sum of its proper divisors (46103).

138297 is an equidigital number, since it uses as much as digits as its factorization.

138297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46102.

The product of its digits is 3024, while the sum is 30.

The square root of 138297 is about 371.8830461314. The cubic root of 138297 is about 51.7135382264.

It can be divided in two parts, 138 and 297, that added together give a triangular number (435 = T₂₉).

The spelling of 138297 in words is "one hundred thirty-eight thousand, two hundred ninety-seven".