138866977973 has 8 divisors (see below), whose sum is σ = 140144155200. Its totient is φ = 137593774368.

The previous prime is 138866977943. The next prime is 138866977981. The reversal of 138866977973 is 379779668831.

138866977973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138866977973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138866977973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138866977933) 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 7 ways as a sum of consecutive naturals, for example, 923168 + ... + 1063001.

It is an arithmetic number, because the mean of its divisors is an integer number (17518019400).

Almost surely, 2^138866977973 is an apocalyptic number.

It is an amenable number.

138866977973 is a deficient number, since it is larger than the sum of its proper divisors (1277177227).

138866977973 is a wasteful number, since it uses less digits than its factorization.

138866977973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986811.

The product of its digits is 576108288, while the sum is 74.

The spelling of 138866977973 in words is "one hundred thirty-eight billion, eight hundred sixty-six million, nine hundred seventy-seven thousand, nine hundred seventy-three".