53005987 has 4 divisors (see below), whose sum is σ = 53065336. Its totient is φ = 52946640.

The previous prime is 53005951. The next prime is 53005999. The reversal of 53005987 is 78950035.

53005987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 53005987 - 2⁷ = 53005859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53005387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28314 + ... + 30127.

It is an arithmetic number, because the mean of its divisors is an integer number (13266334).

Almost surely, 2^53005987 is an apocalyptic number.

53005987 is a deficient number, since it is larger than the sum of its proper divisors (59349).

53005987 is an equidigital number, since it uses as much as digits as its factorization.

53005987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59348.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 53005987 is about 7280.5210665171. The cubic root of 53005987 is about 375.6427188410.

The spelling of 53005987 in words is "fifty-three million, five thousand, nine hundred eighty-seven".