138713871 has 8 divisors (see below), whose sum is σ = 190918144. Its totient is φ = 89492760.

The previous prime is 138713857. The next prime is 138713881. The reversal of 138713871 is 178317831.

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

It is not a de Polignac number, because 138713871 - 2²³ = 130325263 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 (138713831) 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, 745681 + ... + 745866.

It is an arithmetic number, because the mean of its divisors is an integer number (23864768).

Almost surely, 2^138713871 is an apocalyptic number.

138713871 is a deficient number, since it is larger than the sum of its proper divisors (52204273).

138713871 is a wasteful number, since it uses less digits than its factorization.

138713871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491581.

The product of its digits is 28224, while the sum is 39.

The square root of 138713871 is about 11777.6852989032. The cubic root of 138713871 is about 517.6544643809.

The spelling of 138713871 in words is "one hundred thirty-eight million, seven hundred thirteen thousand, eight hundred seventy-one".