138360877 has 4 divisors (see below), whose sum is σ = 138447036. Its totient is φ = 138274720.

The previous prime is 138360857. The next prime is 138360931. The reversal of 138360877 is 778063831.

138360877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1798281 + 136562596 = 1341^2 + 11686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138360877 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 (138360857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40624 + ... + 43897.

It is an arithmetic number, because the mean of its divisors is an integer number (34611759).

Almost surely, 2^138360877 is an apocalyptic number.

It is an amenable number.

138360877 is a deficient number, since it is larger than the sum of its proper divisors (86159).

138360877 is an equidigital number, since it uses as much as digits as its factorization.

138360877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86158.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 138360877 is about 11762.6900409728. The cubic root of 138360877 is about 517.2149886486.

The spelling of 138360877 in words is "one hundred thirty-eight million, three hundred sixty thousand, eight hundred seventy-seven".