138671654 has 8 divisors (see below), whose sum is σ = 226917288. Its totient is φ = 63032560.

The previous prime is 138671651. The next prime is 138671677. The reversal of 138671654 is 456176831.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138671651) 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, 3151607 + ... + 3151650.

It is an arithmetic number, because the mean of its divisors is an integer number (28364661).

Almost surely, 2^138671654 is an apocalyptic number.

138671654 is a deficient number, since it is larger than the sum of its proper divisors (88245634).

138671654 is a wasteful number, since it uses less digits than its factorization.

138671654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6303270.

The product of its digits is 120960, while the sum is 41.

The square root of 138671654 is about 11775.8929173120. The cubic root of 138671654 is about 517.6019437119.

The spelling of 138671654 in words is "one hundred thirty-eight million, six hundred seventy-one thousand, six hundred fifty-four".