63169987 has 4 divisors (see below), whose sum is σ = 63263160. Its totient is φ = 63076816.

The previous prime is 63169979. The next prime is 63169993. The reversal of 63169987 is 78996136.

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 63169987 - 2³ = 63169979 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63169987.

It is not an unprimeable number, because it can be changed into a prime (63169087) 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, 45562 + ... + 46927.

It is an arithmetic number, because the mean of its divisors is an integer number (15815790).

Almost surely, 2^63169987 is an apocalyptic number.

63169987 is a deficient number, since it is larger than the sum of its proper divisors (93173).

63169987 is an equidigital number, since it uses as much as digits as its factorization.

63169987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93172.

The product of its digits is 489888, while the sum is 49.

The square root of 63169987 is about 7947.9548941850. The cubic root of 63169987 is about 398.2632766431.

The spelling of 63169987 in words is "sixty-three million, one hundred sixty-nine thousand, nine hundred eighty-seven".