63986425 has 6 divisors (see below), whose sum is σ = 79343198. Its totient is φ = 51189120.

The previous prime is 63986413. The next prime is 63986467. The reversal of 63986425 is 52468936.

It can be written as a sum of positive squares in 3 ways, for example, as 6651241 + 57335184 = 2579^2 + 7572^2 .

It is not a de Polignac number, because 63986425 - 2⁵ = 63986393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1279704 + ... + 1279753.

Almost surely, 2^63986425 is an apocalyptic number.

It is an amenable number.

63986425 is a deficient number, since it is larger than the sum of its proper divisors (15356773).

63986425 is a wasteful number, since it uses less digits than its factorization.

63986425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559467 (or 2559462 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 63986425 is about 7999.1515175048. The cubic root of 63986425 is about 399.9717167502.

The spelling of 63986425 in words is "sixty-three million, nine hundred eighty-six thousand, four hundred twenty-five".