138587060729 has 4 divisors (see below), whose sum is σ = 149247603876. Its totient is φ = 127926517584.

The previous prime is 138587060719. The next prime is 138587060761. The reversal of 138587060729 is 927060785831.

138587060729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 927060785831 = 1373 ⋅675208147.

It can be written as a sum of positive squares in 2 ways, for example, as 21718801129 + 116868259600 = 147373^2 + 341860^2 .

It is a cyclic number.

It is not a de Polignac number, because 138587060729 - 2²⁰ = 138586012153 is a prime.

It is a super-2 number, since 2×138587060729² (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 (138587060719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5330271554 + ... + 5330271579.

It is an arithmetic number, because the mean of its divisors is an integer number (37311900969).

Almost surely, 2^138587060729 is an apocalyptic number.

It is an amenable number.

138587060729 is a deficient number, since it is larger than the sum of its proper divisors (10660543147).

138587060729 is a wasteful number, since it uses less digits than its factorization.

138587060729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10660543146.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 138587060729 in words is "one hundred thirty-eight billion, five hundred eighty-seven million, sixty thousand, seven hundred twenty-nine".