53849581 has 2 divisors, whose sum is σ = 53849582. Its totient is φ = 53849580.

The previous prime is 53849531. The next prime is 53849611. The reversal of 53849581 is 18594835.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52490025 + 1359556 = 7245^2 + 1166^2 .

It is a cyclic number.

It is not a de Polignac number, because 53849581 - 2⁹ = 53849069 is a prime.

It is a super-2 number, since 2×53849581² = 5799554747751122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53849531) 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, 26924790 + 26924791.

It is an arithmetic number, because the mean of its divisors is an integer number (26924791).

Almost surely, 2^53849581 is an apocalyptic number.

It is an amenable number.

53849581 is a deficient number, since it is larger than the sum of its proper divisors (1).

53849581 is an equidigital number, since it uses as much as digits as its factorization.

53849581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 43.

The square root of 53849581 is about 7338.2273745095. The cubic root of 53849581 is about 377.6250329217.

The spelling of 53849581 in words is "fifty-three million, eight hundred forty-nine thousand, five hundred eighty-one".