53785609 has 2 divisors, whose sum is σ = 53785610. Its totient is φ = 53785608.

The previous prime is 53785601. The next prime is 53785681. The reversal of 53785609 is 90658735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37785609 + 16000000 = 6147^2 + 4000^2 .

It is a cyclic number.

It is not a de Polignac number, because 53785609 - 2³ = 53785601 is a prime.

It is not a weakly prime, because it can be changed into another prime (53785601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26892804 + 26892805.

It is an arithmetic number, because the mean of its divisors is an integer number (26892805).

Almost surely, 2^53785609 is an apocalyptic number.

It is an amenable number.

53785609 is a deficient number, since it is larger than the sum of its proper divisors (1).

53785609 is an equidigital number, since it uses as much as digits as its factorization.

53785609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 53785609 is about 7333.8672608659. The cubic root of 53785609 is about 377.4754371984.

The spelling of 53785609 in words is "fifty-three million, seven hundred eighty-five thousand, six hundred nine".