138667159 has 4 divisors (see below), whose sum is σ = 139894416. Its totient is φ = 137439904.

The previous prime is 138667141. The next prime is 138667163. The reversal of 138667159 is 951766831.

It is a happy number.

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 138667159 - 2⁵ = 138667127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138667259) 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 3 ways as a sum of consecutive naturals, for example, 613459 + ... + 613684.

It is an arithmetic number, because the mean of its divisors is an integer number (34973604).

Almost surely, 2^138667159 is an apocalyptic number.

138667159 is a deficient number, since it is larger than the sum of its proper divisors (1227257).

138667159 is a wasteful number, since it uses less digits than its factorization.

138667159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227256.

The product of its digits is 272160, while the sum is 46.

The square root of 138667159 is about 11775.7020597500. The cubic root of 138667159 is about 517.5963510143.

It can be divided in two parts, 13866 and 7159, that added together give a square (21025 = 145²).

The spelling of 138667159 in words is "one hundred thirty-eight million, six hundred sixty-seven thousand, one hundred fifty-nine".