53787985 has 4 divisors (see below), whose sum is σ = 64545588. Its totient is φ = 43030384.

The previous prime is 53787959. The next prime is 53787989. The reversal of 53787985 is 58978735.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14837904 + 38950081 = 3852^2 + 6241^2 .

It is a cyclic number.

It is not a de Polignac number, because 53787985 - 2¹⁹ = 53263697 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 5378794 + ... + 5378803.

It is an arithmetic number, because the mean of its divisors is an integer number (16136397).

Almost surely, 2^53787985 is an apocalyptic number.

It is an amenable number.

53787985 is a deficient number, since it is larger than the sum of its proper divisors (10757603).

53787985 is a wasteful number, since it uses less digits than its factorization.

53787985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10757602.

The product of its digits is 2116800, while the sum is 52.

The square root of 53787985 is about 7334.0292472828. The cubic root of 53787985 is about 377.4809954908.

The spelling of 53787985 in words is "fifty-three million, seven hundred eighty-seven thousand, nine hundred eighty-five".