138623567 has 8 divisors (see below), whose sum is σ = 146111040. Its totient is φ = 131316640.

The previous prime is 138623561. The next prime is 138623579. The reversal of 138623567 is 765326831.

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

It is not a de Polignac number, because 138623567 - 2⁶ = 138623503 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 (138623561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43559 + ... + 46632.

It is an arithmetic number, because the mean of its divisors is an integer number (18263880).

Almost surely, 2^138623567 is an apocalyptic number.

138623567 is a deficient number, since it is larger than the sum of its proper divisors (7487473).

138623567 is an equidigital number, since it uses as much as digits as its factorization.

138623567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90273.

The product of its digits is 181440, while the sum is 41.

The square root of 138623567 is about 11773.8509842787. The cubic root of 138623567 is about 517.5421073970.

The spelling of 138623567 in words is "one hundred thirty-eight million, six hundred twenty-three thousand, five hundred sixty-seven".