53439839 has 2 divisors, whose sum is σ = 53439840. Its totient is φ = 53439838.

The previous prime is 53439829. The next prime is 53439853. The reversal of 53439839 is 93893435.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53439839 - 2²⁴ = 36662623 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53439839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53439829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26719919 + 26719920.

It is an arithmetic number, because the mean of its divisors is an integer number (26719920).

Almost surely, 2^53439839 is an apocalyptic number.

53439839 is a deficient number, since it is larger than the sum of its proper divisors (1).

53439839 is an equidigital number, since it uses as much as digits as its factorization.

53439839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 44.

The square root of 53439839 is about 7310.2557410805. The cubic root of 53439839 is about 376.6648091206.

The spelling of 53439839 in words is "fifty-three million, four hundred thirty-nine thousand, eight hundred thirty-nine".