53658809 has 2 divisors, whose sum is σ = 53658810. Its totient is φ = 53658808.

The previous prime is 53658763. The next prime is 53658821. The reversal of 53658809 is 90885635.

53658809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51265600 + 2393209 = 7160^2 + 1547^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53658809 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53658809.

It is not a weakly prime, because it can be changed into another prime (53658859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26829404 + 26829405.

It is an arithmetic number, because the mean of its divisors is an integer number (26829405).

Almost surely, 2^53658809 is an apocalyptic number.

It is an amenable number.

53658809 is a deficient number, since it is larger than the sum of its proper divisors (1).

53658809 is an equidigital number, since it uses as much as digits as its factorization.

53658809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 53658809 is about 7325.2173346598. The cubic root of 53658809 is about 377.1785700076.

The spelling of 53658809 in words is "fifty-three million, six hundred fifty-eight thousand, eight hundred nine".