53239989 has 32 divisors (see below), whose sum is σ = 81174528. Its totient is φ = 30744000.

The previous prime is 53239933. The next prime is 53239999. The reversal of 53239989 is 98993235.

It is not a de Polignac number, because 53239989 - 2¹¹ = 53237941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53239999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72267 + ... + 72999.

It is an arithmetic number, because the mean of its divisors is an integer number (2536704).

Almost surely, 2^53239989 is an apocalyptic number.

It is an amenable number.

53239989 is a deficient number, since it is larger than the sum of its proper divisors (27934539).

53239989 is a wasteful number, since it uses less digits than its factorization.

53239989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849.

The product of its digits is 524880, while the sum is 48.

The square root of 53239989 is about 7296.5737850035. The cubic root of 53239989 is about 376.1946823601.

It can be divided in two parts, 53 and 239989, that added together give a palindrome (240042).

The spelling of 53239989 in words is "fifty-three million, two hundred thirty-nine thousand, nine hundred eighty-nine".