138536627 has 4 divisors (see below), whose sum is σ = 138936216. Its totient is φ = 138137040.

The previous prime is 138536609. The next prime is 138536633. The reversal of 138536627 is 726635831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 726635831 = 859 ⋅845909.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138536627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138536227) 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 3 ways as a sum of consecutive naturals, for example, 199274 + ... + 199967.

It is an arithmetic number, because the mean of its divisors is an integer number (34734054).

Almost surely, 2^138536627 is an apocalyptic number.

138536627 is a deficient number, since it is larger than the sum of its proper divisors (399589).

138536627 is an equidigital number, since it uses as much as digits as its factorization.

138536627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399588.

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

The square root of 138536627 is about 11770.1583251883. The cubic root of 138536627 is about 517.4338898177.

The spelling of 138536627 in words is "one hundred thirty-eight million, five hundred thirty-six thousand, six hundred twenty-seven".