53444389 has 2 divisors, whose sum is σ = 53444390. Its totient is φ = 53444388.

The previous prime is 53444353. The next prime is 53444393. The reversal of 53444389 is 98344435.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49815364 + 3629025 = 7058^2 + 1905^2 .

It is a cyclic number.

It is not a de Polignac number, because 53444389 - 2¹³ = 53436197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53444329) 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, 26722194 + 26722195.

It is an arithmetic number, because the mean of its divisors is an integer number (26722195).

Almost surely, 2^53444389 is an apocalyptic number.

It is an amenable number.

53444389 is a deficient number, since it is larger than the sum of its proper divisors (1).

53444389 is an equidigital number, since it uses as much as digits as its factorization.

53444389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 40.

The square root of 53444389 is about 7310.5669410792. The cubic root of 53444389 is about 376.6754988749.

The spelling of 53444389 in words is "fifty-three million, four hundred forty-four thousand, three hundred eighty-nine".