53567987 has 4 divisors (see below), whose sum is σ = 58437816. Its totient is φ = 48698160.

The previous prime is 53567977. The next prime is 53567993. The reversal of 53567987 is 78976535.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53567987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53567947) 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, 2434898 + ... + 2434919.

It is an arithmetic number, because the mean of its divisors is an integer number (14609454).

Almost surely, 2^53567987 is an apocalyptic number.

53567987 is a deficient number, since it is larger than the sum of its proper divisors (4869829).

53567987 is a wasteful number, since it uses less digits than its factorization.

53567987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4869828.

The product of its digits is 1587600, while the sum is 50.

The square root of 53567987 is about 7319.0154392514. The cubic root of 53567987 is about 376.9656477927.

The spelling of 53567987 in words is "fifty-three million, five hundred sixty-seven thousand, nine hundred eighty-seven".