138547877 has 8 divisors (see below), whose sum is σ = 154350840. Its totient is φ = 123480000.

The previous prime is 138547873. The next prime is 138547889. The reversal of 138547877 is 778745831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10201636 + 128346241 = 3194^2 + 11329^2 .

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 138547877 - 2² = 138547873 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 (138547873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183374 + ... + 184127.

It is an arithmetic number, because the mean of its divisors is an integer number (19293855).

Almost surely, 2^138547877 is an apocalyptic number.

It is an amenable number.

138547877 is a deficient number, since it is larger than the sum of its proper divisors (15802963).

138547877 is a wasteful number, since it uses less digits than its factorization.

138547877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367543.

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

The square root of 138547877 is about 11770.6362189985. The cubic root of 138547877 is about 517.4478956775.

The spelling of 138547877 in words is "one hundred thirty-eight million, five hundred forty-seven thousand, eight hundred seventy-seven".