138834721293 has 8 divisors (see below), whose sum is σ = 185117619456. Its totient is φ = 92554152000.

The previous prime is 138834721177. The next prime is 138834721303. The reversal of 138834721293 is 392127438831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138834721293 - 2⁹ = 138834720781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138834721793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438013 + ... + 685218.

It is an arithmetic number, because the mean of its divisors is an integer number (23139702432).

Almost surely, 2^138834721293 is an apocalyptic number.

It is an amenable number.

138834721293 is a deficient number, since it is larger than the sum of its proper divisors (46282898163).

138834721293 is a wasteful number, since it uses less digits than its factorization.

138834721293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164435.

The product of its digits is 1741824, while the sum is 51.

The spelling of 138834721293 in words is "one hundred thirty-eight billion, eight hundred thirty-four million, seven hundred twenty-one thousand, two hundred ninety-three".