63386521 has 4 divisors (see below), whose sum is σ = 69148944. Its totient is φ = 57624100.

The previous prime is 63386507. The next prime is 63386539. The reversal of 63386521 is 12568336.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63386521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63386581) 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, 2881195 + ... + 2881216.

It is an arithmetic number, because the mean of its divisors is an integer number (17287236).

Almost surely, 2^63386521 is an apocalyptic number.

It is an amenable number.

63386521 is a deficient number, since it is larger than the sum of its proper divisors (5762423).

63386521 is a wasteful number, since it uses less digits than its factorization.

63386521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5762422.

The product of its digits is 25920, while the sum is 34.

The square root of 63386521 is about 7961.5652355551. The cubic root of 63386521 is about 398.7178131336.

The spelling of 63386521 in words is "sixty-three million, three hundred eighty-six thousand, five hundred twenty-one".