138877547 has 8 divisors (see below), whose sum is σ = 140761152. Its totient is φ = 137005000.

The previous prime is 138877513. The next prime is 138877561. The reversal of 138877547 is 745778831.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 138877547 - 2¹⁸ = 138615403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138877495 and 138877504.

It is not an unprimeable number, because it can be changed into a prime (138877507) 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 7 ways as a sum of consecutive naturals, for example, 24272 + ... + 29442.

It is an arithmetic number, because the mean of its divisors is an integer number (17595144).

Almost surely, 2^138877547 is an apocalyptic number.

138877547 is a deficient number, since it is larger than the sum of its proper divisors (1883605).

138877547 is a wasteful number, since it uses less digits than its factorization.

138877547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5529.

The product of its digits is 1317120, while the sum is 50.

The square root of 138877547 is about 11784.6318143589. The cubic root of 138877547 is about 517.8579871876.

The spelling of 138877547 in words is "one hundred thirty-eight million, eight hundred seventy-seven thousand, five hundred forty-seven".