63867385 has 16 divisors (see below), whose sum is σ = 82686096. Its totient is φ = 47177728.

The previous prime is 63867373. The next prime is 63867437. The reversal of 63867385 is 58376836.

It can be written as a sum of positive squares in 8 ways, for example, as 17464041 + 46403344 = 4179^2 + 6812^2 .

It is a cyclic number.

It is not a de Polignac number, because 63867385 - 2⁷ = 63867257 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2584 + ... + 11593.

It is an arithmetic number, because the mean of its divisors is an integer number (5167881).

Almost surely, 2^63867385 is an apocalyptic number.

It is an amenable number.

63867385 is a deficient number, since it is larger than the sum of its proper divisors (18818711).

63867385 is a wasteful number, since it uses less digits than its factorization.

63867385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14252.

The product of its digits is 725760, while the sum is 46.

The square root of 63867385 is about 7991.7072644085. The cubic root of 63867385 is about 399.7235277017.

The spelling of 63867385 in words is "sixty-three million, eight hundred sixty-seven thousand, three hundred eighty-five".