63871239 has 16 divisors (see below), whose sum is σ = 86688000. Its totient is φ = 41823936.

The previous prime is 63871231. The next prime is 63871259. The reversal of 63871239 is 93217836.

It is not a de Polignac number, because 63871239 - 2³ = 63871231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63871197 and 63871206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63871231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48907 + ... + 50195.

It is an arithmetic number, because the mean of its divisors is an integer number (5418000).

Almost surely, 2^63871239 is an apocalyptic number.

63871239 is a deficient number, since it is larger than the sum of its proper divisors (22816761).

63871239 is a wasteful number, since it uses less digits than its factorization.

63871239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574.

The product of its digits is 54432, while the sum is 39.

The square root of 63871239 is about 7991.9483857192. The cubic root of 63871239 is about 399.7315678174.

It can be divided in two parts, 6387 and 1239, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 63871239 in words is "sixty-three million, eight hundred seventy-one thousand, two hundred thirty-nine".