53581389 has 4 divisors (see below), whose sum is σ = 71441856. Its totient is φ = 35720924.

The previous prime is 53581369. The next prime is 53581391. The reversal of 53581389 is 98318535.

53581389 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53581389 - 2¹⁶ = 53515853 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 53581389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53581369) 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, 8930229 + ... + 8930234.

It is an arithmetic number, because the mean of its divisors is an integer number (17860464).

Almost surely, 2^53581389 is an apocalyptic number.

It is an amenable number.

53581389 is a deficient number, since it is larger than the sum of its proper divisors (17860467).

53581389 is a wasteful number, since it uses less digits than its factorization.

53581389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17860466.

The product of its digits is 129600, while the sum is 42.

The square root of 53581389 is about 7319.9309422972. The cubic root of 53581389 is about 376.9970824401.

The spelling of 53581389 in words is "fifty-three million, five hundred eighty-one thousand, three hundred eighty-nine".