53443391 has 2 divisors, whose sum is σ = 53443392. Its totient is φ = 53443390.

The previous prime is 53443363. The next prime is 53443457. The reversal of 53443391 is 19334435.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53443391 - 2¹⁴ = 53427007 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 (53443331) 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 as a sum of consecutive naturals, namely, 26721695 + 26721696.

It is an arithmetic number, because the mean of its divisors is an integer number (26721696).

Almost surely, 2^53443391 is an apocalyptic number.

53443391 is a deficient number, since it is larger than the sum of its proper divisors (1).

53443391 is an equidigital number, since it uses as much as digits as its factorization.

53443391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 32.

The square root of 53443391 is about 7310.4986834005. The cubic root of 53443391 is about 376.6731542291.

The spelling of 53443391 in words is "fifty-three million, four hundred forty-three thousand, three hundred ninety-one".