138877654 has 8 divisors (see below), whose sum is σ = 210263688. Its totient is φ = 68789760.

The previous prime is 138877643. The next prime is 138877679. The reversal of 138877654 is 456778831.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 138877598 and 138877607.

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, 324267 + ... + 324694.

It is an arithmetic number, because the mean of its divisors is an integer number (26282961).

Almost surely, 2^138877654 is an apocalyptic number.

138877654 is a deficient number, since it is larger than the sum of its proper divisors (71386034).

138877654 is a wasteful number, since it uses less digits than its factorization.

138877654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649070.

The product of its digits is 1128960, while the sum is 49.

The square root of 138877654 is about 11784.6363541689. The cubic root of 138877654 is about 517.8581201843.

The spelling of 138877654 in words is "one hundred thirty-eight million, eight hundred seventy-seven thousand, six hundred fifty-four".