53400439 has 2 divisors, whose sum is σ = 53400440. Its totient is φ = 53400438.

The previous prime is 53400433. The next prime is 53400443. The reversal of 53400439 is 93400435.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53400439 - 2¹⁷ = 53269367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53400433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26700219 + 26700220.

It is an arithmetic number, because the mean of its divisors is an integer number (26700220).

Almost surely, 2^53400439 is an apocalyptic number.

53400439 is a deficient number, since it is larger than the sum of its proper divisors (1).

53400439 is an equidigital number, since it uses as much as digits as its factorization.

53400439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 53400439 is about 7307.5604000241. The cubic root of 53400439 is about 376.5722175106.

The spelling of 53400439 in words is "fifty-three million, four hundred thousand, four hundred thirty-nine".