138971022347 has 4 divisors (see below), whose sum is σ = 139187826456. Its totient is φ = 138754218240.

The previous prime is 138971022313. The next prime is 138971022373. The reversal of 138971022347 is 743220179831.

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 138971022347 - 2¹⁰ = 138971021323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138971028347) 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, 108401093 + ... + 108402374.

It is an arithmetic number, because the mean of its divisors is an integer number (34796956614).

Almost surely, 2^138971022347 is an apocalyptic number.

138971022347 is a deficient number, since it is larger than the sum of its proper divisors (216804109).

138971022347 is an equidigital number, since it uses as much as digits as its factorization.

138971022347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216804108.

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 138971022347 in words is "one hundred thirty-eight billion, nine hundred seventy-one million, twenty-two thousand, three hundred forty-seven".