138824578943 has 4 divisors (see below), whose sum is σ = 138825733488. Its totient is φ = 138823424400.

The previous prime is 138824578927. The next prime is 138824578973. The reversal of 138824578943 is 349875428831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349875428831 = 259771 ⋅1346861.

It is a cyclic number.

It is not a de Polignac number, because 138824578943 - 2⁴ = 138824578927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138824578903) 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, 372758 + ... + 645443.

It is an arithmetic number, because the mean of its divisors is an integer number (34706433372).

Almost surely, 2^138824578943 is an apocalyptic number.

138824578943 is a deficient number, since it is larger than the sum of its proper divisors (1154545).

138824578943 is a wasteful number, since it uses less digits than its factorization.

138824578943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154544.

The product of its digits is 46448640, while the sum is 62.

The spelling of 138824578943 in words is "one hundred thirty-eight billion, eight hundred twenty-four million, five hundred seventy-eight thousand, nine hundred forty-three".