138727070833 has 4 divisors (see below), whose sum is σ = 149398383988. Its totient is φ = 128055757680.

The previous prime is 138727070777. The next prime is 138727070849. The reversal of 138727070833 is 338070727831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 338070727831 = 23 ⋅14698727297.

It can be written as a sum of positive squares in 2 ways, for example, as 56430952704 + 82296118129 = 237552^2 + 286873^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138727070833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138727070863) 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, 5335656558 + ... + 5335656583.

It is an arithmetic number, because the mean of its divisors is an integer number (37349595997).

Almost surely, 2^138727070833 is an apocalyptic number.

138727070833 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

138727070833 is a deficient number, since it is larger than the sum of its proper divisors (10671313155).

138727070833 is a wasteful number, since it uses less digits than its factorization.

138727070833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10671313154.

The product of its (nonzero) digits is 1185408, while the sum is 49.

The spelling of 138727070833 in words is "one hundred thirty-eight billion, seven hundred twenty-seven million, seventy thousand, eight hundred thirty-three".