138953343381 has 4 divisors (see below), whose sum is σ = 185271124512. Its totient is φ = 92635562252.

The previous prime is 138953343293. The next prime is 138953343383. The reversal of 138953343381 is 183343359831.

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 138953343381 - 2¹⁷ = 138953212309 is a prime.

It is a super-2 number, since 2×138953343381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138953343383) 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, 23158890561 + ... + 23158890566.

It is an arithmetic number, because the mean of its divisors is an integer number (46317781128).

Almost surely, 2^138953343381 is an apocalyptic number.

It is an amenable number.

138953343381 is a deficient number, since it is larger than the sum of its proper divisors (46317781131).

138953343381 is an equidigital number, since it uses as much as digits as its factorization.

138953343381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46317781130.

The product of its digits is 2799360, while the sum is 51.

The spelling of 138953343381 in words is "one hundred thirty-eight billion, nine hundred fifty-three million, three hundred forty-three thousand, three hundred eighty-one".