63988487 has 4 divisors (see below), whose sum is σ = 64032840. Its totient is φ = 63944136.

The previous prime is 63988469. The next prime is 63988489. The reversal of 63988487 is 78488936.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 63988487 - 2²⁰ = 62939911 is a prime.

It is a super-4 number, since 4×63988487⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63988489) 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, 19937 + ... + 22922.

It is an arithmetic number, because the mean of its divisors is an integer number (16008210).

Almost surely, 2^63988487 is an apocalyptic number.

63988487 is a deficient number, since it is larger than the sum of its proper divisors (44353).

63988487 is a wasteful number, since it uses less digits than its factorization.

63988487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44352.

The product of its digits is 2322432, while the sum is 53.

The square root of 63988487 is about 7999.2804051365. The cubic root of 63988487 is about 399.9760131449.

The spelling of 63988487 in words is "sixty-three million, nine hundred eighty-eight thousand, four hundred eighty-seven".