138404237107 has 4 divisors (see below), whose sum is σ = 140071758120. Its totient is φ = 136736716096.

The previous prime is 138404237099. The next prime is 138404237113. The reversal of 138404237107 is 701732404831.

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 138404237107 - 2³ = 138404237099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138404237107.

It is not an unprimeable number, because it can be changed into a prime (138404237117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833760382 + ... + 833760547.

It is an arithmetic number, because the mean of its divisors is an integer number (35017939530).

Almost surely, 2^138404237107 is an apocalyptic number.

138404237107 is a deficient number, since it is larger than the sum of its proper divisors (1667521013).

138404237107 is an equidigital number, since it uses as much as digits as its factorization.

138404237107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667521012.

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 138404237107 in words is "one hundred thirty-eight billion, four hundred four million, two hundred thirty-seven thousand, one hundred seven".