138315727 has 8 divisors (see below), whose sum is σ = 151270992. Its totient is φ = 125424000.

The previous prime is 138315719. The next prime is 138315733. The reversal of 138315727 is 727513831.

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 138315727 - 2³ = 138315719 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 (138315127) 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, 11268 + ... + 20089.

It is an arithmetic number, because the mean of its divisors is an integer number (18908874).

Almost surely, 2^138315727 is an apocalyptic number.

138315727 is a deficient number, since it is larger than the sum of its proper divisors (12955265).

138315727 is a wasteful number, since it uses less digits than its factorization.

138315727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31769.

The product of its digits is 35280, while the sum is 37.

The square root of 138315727 is about 11760.7706805294. The cubic root of 138315727 is about 517.1587232316.

The spelling of 138315727 in words is "one hundred thirty-eight million, three hundred fifteen thousand, seven hundred twenty-seven".