138313867 has 4 divisors (see below), whose sum is σ = 138422296. Its totient is φ = 138205440.

The previous prime is 138313831. The next prime is 138313883. The reversal of 138313867 is 768313831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138313867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138313817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52278 + ... + 54859.

It is an arithmetic number, because the mean of its divisors is an integer number (34605574).

Almost surely, 2^138313867 is an apocalyptic number.

138313867 is a deficient number, since it is larger than the sum of its proper divisors (108429).

138313867 is a wasteful number, since it uses less digits than its factorization.

138313867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108428.

The product of its digits is 72576, while the sum is 40.

The square root of 138313867 is about 11760.6916038131. The cubic root of 138313867 is about 517.1564050582.

The spelling of 138313867 in words is "one hundred thirty-eight million, three hundred thirteen thousand, eight hundred sixty-seven".