138670043387 has 4 divisors (see below), whose sum is σ = 138678166536. Its totient is φ = 138661920240.

The previous prime is 138670043377. The next prime is 138670043423. The reversal of 138670043387 is 783340076831.

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 138670043387 - 2⁴ = 138670043371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138670043377) 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, 4035914 + ... + 4070127.

It is an arithmetic number, because the mean of its divisors is an integer number (34669541634).

Almost surely, 2^138670043387 is an apocalyptic number.

138670043387 is a deficient number, since it is larger than the sum of its proper divisors (8123149).

138670043387 is an equidigital number, since it uses as much as digits as its factorization.

138670043387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8123148.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 138670043387 in words is "one hundred thirty-eight billion, six hundred seventy million, forty-three thousand, three hundred eighty-seven".