53787987 has 12 divisors (see below), whose sum is σ = 84756984. Its totient is φ = 32598720.

The previous prime is 53787959. The next prime is 53787989. The reversal of 53787987 is 78978735.

It is a de Polignac number, because none of the positive numbers 2^k-53787987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53787989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 271558 + ... + 271755.

It is an arithmetic number, because the mean of its divisors is an integer number (7063082).

Almost surely, 2^53787987 is an apocalyptic number.

53787987 is a deficient number, since it is larger than the sum of its proper divisors (30968997).

53787987 is a wasteful number, since it uses less digits than its factorization.

53787987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543330 (or 543327 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The square root of 53787987 is about 7334.0293836335. The cubic root of 53787987 is about 377.4810001694.

The spelling of 53787987 in words is "fifty-three million, seven hundred eighty-seven thousand, nine hundred eighty-seven".