63138439 has 8 divisors (see below), whose sum is σ = 77708960. Its totient is φ = 49955616.

The previous prime is 63138409. The next prime is 63138451. The reversal of 63138439 is 93483136.

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 63138439 - 2¹⁵ = 63105671 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63138398 and 63138407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63138409) 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, 346824 + ... + 347005.

It is an arithmetic number, because the mean of its divisors is an integer number (9713620).

Almost surely, 2^63138439 is an apocalyptic number.

63138439 is a deficient number, since it is larger than the sum of its proper divisors (14570521).

63138439 is a wasteful number, since it uses less digits than its factorization.

63138439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693849.

The product of its digits is 46656, while the sum is 37.

The square root of 63138439 is about 7945.9699848414. The cubic root of 63138439 is about 398.1969661337.

The spelling of 63138439 in words is "sixty-three million, one hundred thirty-eight thousand, four hundred thirty-nine".