138848831 has 6 divisors (see below), whose sum is σ = 152619096. Its totient is φ = 126226100.

The previous prime is 138848821. The next prime is 138848833.

138848831 is nontrivially palindromic in base 10.

138848831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-138848831 is a prime.

It is a super-2 number, since 2×138848831² = 38557995740133122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138848833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 573635 + ... + 573876.

It is an arithmetic number, because the mean of its divisors is an integer number (25436516).

Almost surely, 2^138848831 is an apocalyptic number.

138848831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138848831 is a deficient number, since it is larger than the sum of its proper divisors (13770265).

138848831 is a wasteful number, since it uses less digits than its factorization.

138848831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147533 (or 1147522 counting only the distinct ones).

The product of its digits is 147456, while the sum is 44.

The square root of 138848831 is about 11783.4133849237. The cubic root of 138848831 is about 517.8222918686.

The spelling of 138848831 in words is "one hundred thirty-eight million, eight hundred forty-eight thousand, eight hundred thirty-one".