138689795 has 4 divisors (see below), whose sum is σ = 166427760. Its totient is φ = 110951832.

The previous prime is 138689779. The next prime is 138689807. The reversal of 138689795 is 597986831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 597986831 = 13 ⋅45998987.

It is a cyclic number.

It is not a de Polignac number, because 138689795 - 2⁴ = 138689779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138689795.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13868975 + ... + 13868984.

It is an arithmetic number, because the mean of its divisors is an integer number (41606940).

Almost surely, 2^138689795 is an apocalyptic number.

138689795 is a deficient number, since it is larger than the sum of its proper divisors (27737965).

138689795 is an equidigital number, since it uses as much as digits as its factorization.

138689795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27737964.

The product of its digits is 3265920, while the sum is 56.

The square root of 138689795 is about 11776.6631521836. The cubic root of 138689795 is about 517.6245135910.

The spelling of 138689795 in words is "one hundred thirty-eight million, six hundred eighty-nine thousand, seven hundred ninety-five".