138927238169 has 4 divisors (see below), whose sum is σ = 144967552896. Its totient is φ = 132886923444.

The previous prime is 138927238159. The next prime is 138927238189. The reversal of 138927238169 is 961832729831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138927238169 - 2¹⁶ = 138927172633 is a prime.

It is a super-2 number, since 2×138927238169² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138927238159) 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, 3020157329 + ... + 3020157374.

It is an arithmetic number, because the mean of its divisors is an integer number (36241888224).

Almost surely, 2^138927238169 is an apocalyptic number.

It is an amenable number.

138927238169 is a deficient number, since it is larger than the sum of its proper divisors (6040314727).

138927238169 is an equidigital number, since it uses as much as digits as its factorization.

138927238169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6040314726.

The product of its digits is 7838208, while the sum is 59.

The spelling of 138927238169 in words is "one hundred thirty-eight billion, nine hundred twenty-seven million, two hundred thirty-eight thousand, one hundred sixty-nine".