138664342 has 8 divisors (see below), whose sum is σ = 220231656. Its totient is φ = 65253792.

The previous prime is 138664327. The next prime is 138664363. The reversal of 138664342 is 243466831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 2039148 + ... + 2039215.

It is an arithmetic number, because the mean of its divisors is an integer number (27528957).

Almost surely, 2^138664342 is an apocalyptic number.

138664342 is a deficient number, since it is larger than the sum of its proper divisors (81567314).

138664342 is a wasteful number, since it uses less digits than its factorization.

138664342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4078382.

The product of its digits is 82944, while the sum is 37.

The square root of 138664342 is about 11775.5824484397. The cubic root of 138664342 is about 517.5928460296.

The spelling of 138664342 in words is "one hundred thirty-eight million, six hundred sixty-four thousand, three hundred forty-two".