53442009 has 6 divisors (see below), whose sum is σ = 77194026. Its totient is φ = 35628000.

The previous prime is 53441977. The next prime is 53442017. The reversal of 53442009 is 90024435.

It can be written as a sum of positive squares in only one way, i.e., 34257609 + 19184400 = 5853^2 + 4380^2 .

It is not a de Polignac number, because 53442009 - 2⁵ = 53441977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53442019) 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 in 5 ways as a sum of consecutive naturals, for example, 2968992 + ... + 2969009.

It is an arithmetic number, because the mean of its divisors is an integer number (12865671).

Almost surely, 2^53442009 is an apocalyptic number.

It is an amenable number.

53442009 is a deficient number, since it is larger than the sum of its proper divisors (23752017).

53442009 is a wasteful number, since it uses less digits than its factorization.

53442009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5938007 (or 5938004 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 53442009 is about 7310.4041611938. The cubic root of 53442009 is about 376.6699073868.

The spelling of 53442009 in words is "fifty-three million, four hundred forty-two thousand, nine".