138156843 has 8 divisors (see below), whose sum is σ = 200955456. Its totient is φ = 83731400.

The previous prime is 138156827. The next prime is 138156871. The reversal of 138156843 is 348651831.

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

It is a cyclic number.

It is not a de Polignac number, because 138156843 - 2⁴ = 138156827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138156803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2093253 + ... + 2093318.

It is an arithmetic number, because the mean of its divisors is an integer number (25119432).

Almost surely, 2^138156843 is an apocalyptic number.

138156843 is a deficient number, since it is larger than the sum of its proper divisors (62798613).

138156843 is a wasteful number, since it uses less digits than its factorization.

138156843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4186585.

The product of its digits is 69120, while the sum is 39.

The square root of 138156843 is about 11754.0139101500. The cubic root of 138156843 is about 516.9606263826.

The spelling of 138156843 in words is "one hundred thirty-eight million, one hundred fifty-six thousand, eight hundred forty-three".