138000831 has 4 divisors (see below), whose sum is σ = 184001112. Its totient is φ = 92000552.

The previous prime is 138000829. The next prime is 138000847.

138000831 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138000831 - 2¹ = 138000829 is a prime.

It is a super-2 number, since 2×138000831² = 38088458713381122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138000931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23000136 + ... + 23000141.

It is an arithmetic number, because the mean of its divisors is an integer number (46000278).

Almost surely, 2^138000831 is an apocalyptic number.

138000831 is a deficient number, since it is larger than the sum of its proper divisors (46000281).

138000831 is an equidigital number, since it uses as much as digits as its factorization.

138000831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46000280.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 138000831 is about 11747.3754941263. The cubic root of 138000831 is about 516.7659625088.

It can be divided in two parts, 138000 and 831, that added together give a palindrome (138831).

The spelling of 138000831 in words is "one hundred thirty-eight million, eight hundred thirty-one", and thus it is an aban number.