138097 has 4 divisors (see below), whose sum is σ = 138996. Its totient is φ = 137200.

The previous prime is 138079. The next prime is 138101. The reversal of 138097 is 790831.

138097 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.

It can be written as a sum of positive squares in 2 ways, for example, as 128881 + 9216 = 359^2 + 96^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138097 is a prime.

It is a Duffinian number.

138097 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (138007) 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, 154 + ... + 547.

It is an arithmetic number, because the mean of its divisors is an integer number (34749).

2¹³⁸⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

138097 is a deficient number, since it is larger than the sum of its proper divisors (899).

138097 is an equidigital number, since it uses as much as digits as its factorization.

138097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 138097 is about 371.6140470973. The cubic root of 138097 is about 51.6885974651.

The spelling of 138097 in words is "one hundred thirty-eight thousand, ninety-seven".