138697 has 8 divisors (see below), whose sum is σ = 153216. Its totient is φ = 124752.

The previous prime is 138683. The next prime is 138727. The reversal of 138697 is 796831.

138697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138697 - 2⁷ = 138569 is a prime.

It is a Duffinian number.

138697 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (138617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498 + ... + 724.

It is an arithmetic number, because the mean of its divisors is an integer number (19152).

2¹³⁸⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

138697 is a deficient number, since it is larger than the sum of its proper divisors (14519).

138697 is a wasteful number, since it uses less digits than its factorization.

138697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287.

The product of its digits is 9072, while the sum is 34.

The square root of 138697 is about 372.4204613068. The cubic root of 138697 is about 51.7633477048.

The spelling of 138697 in words is "one hundred thirty-eight thousand, six hundred ninety-seven".