138467849 has 4 divisors (see below), whose sum is σ = 149119236. Its totient is φ = 127816464.

The previous prime is 138467831. The next prime is 138467893. The reversal of 138467849 is 948764831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9486400 + 128981449 = 3080^2 + 11357^2 .

It is a cyclic number.

It is not a de Polignac number, because 138467849 - 2¹² = 138463753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138467797 and 138467806.

It is not an unprimeable number, because it can be changed into a prime (138467449) 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, 5325674 + ... + 5325699.

It is an arithmetic number, because the mean of its divisors is an integer number (37279809).

Almost surely, 2^138467849 is an apocalyptic number.

It is an amenable number.

138467849 is a deficient number, since it is larger than the sum of its proper divisors (10651387).

138467849 is a wasteful number, since it uses less digits than its factorization.

138467849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10651386.

The product of its digits is 1161216, while the sum is 50.

The square root of 138467849 is about 11767.2362515588. The cubic root of 138467849 is about 517.3482471016.

The spelling of 138467849 in words is "one hundred thirty-eight million, four hundred sixty-seven thousand, eight hundred forty-nine".