53421239 has 2 divisors, whose sum is σ = 53421240. Its totient is φ = 53421238.

The previous prime is 53421209. The next prime is 53421241. The reversal of 53421239 is 93212435.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53421239 - 2¹⁶ = 53355703 is a prime.

It is a Sophie Germain prime.

Together with 53421241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53421209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26710619 + 26710620.

It is an arithmetic number, because the mean of its divisors is an integer number (26710620).

Almost surely, 2^53421239 is an apocalyptic number.

53421239 is a deficient number, since it is larger than the sum of its proper divisors (1).

53421239 is an equidigital number, since it uses as much as digits as its factorization.

53421239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 29.

The square root of 53421239 is about 7308.9834450490. The cubic root of 53421239 is about 376.6211040337.

The spelling of 53421239 in words is "fifty-three million, four hundred twenty-one thousand, two hundred thirty-nine".