53443439 has 8 divisors (see below), whose sum is σ = 62113920. Its totient is φ = 45031896.

The previous prime is 53443391. The next prime is 53443457. The reversal of 53443439 is 93434435.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53443439 - 2²⁰ = 52394863 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53443399 and 53443408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53443499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64289 + ... + 65114.

It is an arithmetic number, because the mean of its divisors is an integer number (7764240).

Almost surely, 2^53443439 is an apocalyptic number.

53443439 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

53443439 is a deficient number, since it is larger than the sum of its proper divisors (8670481).

53443439 is a wasteful number, since it uses less digits than its factorization.

53443439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129469.

The product of its digits is 77760, while the sum is 35.

The square root of 53443439 is about 7310.5019663495. The cubic root of 53443439 is about 376.6732669983.

The spelling of 53443439 in words is "fifty-three million, four hundred forty-three thousand, four hundred thirty-nine".