63888257 has 4 divisors (see below), whose sum is σ = 64520916. Its totient is φ = 63255600.

The previous prime is 63888229. The next prime is 63888263. The reversal of 63888257 is 75288836.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50353216 + 13535041 = 7096^2 + 3679^2 .

It is a cyclic number.

It is not a de Polignac number, because 63888257 - 2¹⁶ = 63822721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63888277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316178 + ... + 316379.

It is an arithmetic number, because the mean of its divisors is an integer number (16130229).

Almost surely, 2^63888257 is an apocalyptic number.

It is an amenable number.

63888257 is a deficient number, since it is larger than the sum of its proper divisors (632659).

63888257 is a wasteful number, since it uses less digits than its factorization.

63888257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632658.

The product of its digits is 645120, while the sum is 47.

The square root of 63888257 is about 7993.0130113744. The cubic root of 63888257 is about 399.7670664646.

The spelling of 63888257 in words is "sixty-three million, eight hundred eighty-eight thousand, two hundred fifty-seven".