63915 has 8 divisors (see below), whose sum is σ = 102288. Its totient is φ = 34080.

The previous prime is 63913. The next prime is 63929. The reversal of 63915 is 51936.

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

It is not a de Polignac number, because 63915 - 2¹ = 63913 is a prime.

63915 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2116 + ... + 2145.

It is an arithmetic number, because the mean of its divisors is an integer number (12786).

2⁶³⁹¹⁵ is an apocalyptic number.

63915 is a deficient number, since it is larger than the sum of its proper divisors (38373).

63915 is a wasteful number, since it uses less digits than its factorization.

63915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4269.

The product of its digits is 810, while the sum is 24.

The square root of 63915 is about 252.8141609958. The cubic root of 63915 is about 39.9822838213.

The spelling of 63915 in words is "sixty-three thousand, nine hundred fifteen".