138820607 has 4 divisors (see below), whose sum is σ = 138858720. Its totient is φ = 138782496.

The previous prime is 138820601. The next prime is 138820667. The reversal of 138820607 is 706028831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138820607 - 2⁶ = 138820543 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 (138820601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12938 + ... + 21095.

It is an arithmetic number, because the mean of its divisors is an integer number (34714680).

Almost surely, 2^138820607 is an apocalyptic number.

138820607 is a deficient number, since it is larger than the sum of its proper divisors (38113).

138820607 is an equidigital number, since it uses as much as digits as its factorization.

138820607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38112.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 138820607 is about 11782.2157084311. The cubic root of 138820607 is about 517.7872033322.

The spelling of 138820607 in words is "one hundred thirty-eight million, eight hundred twenty thousand, six hundred seven".