52005909 has 4 divisors (see below), whose sum is σ = 69341216. Its totient is φ = 34670604.

The previous prime is 52005901. The next prime is 52005911. The reversal of 52005909 is 90950025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 52005909 - 2³ = 52005901 is a prime.

It is a super-2 number, since 2×52005909² = 5409229141832562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52005901) 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 in 3 ways as a sum of consecutive naturals, for example, 8667649 + ... + 8667654.

It is an arithmetic number, because the mean of its divisors is an integer number (17335304).

Almost surely, 2^52005909 is an apocalyptic number.

It is an amenable number.

52005909 is a deficient number, since it is larger than the sum of its proper divisors (17335307).

52005909 is a wasteful number, since it uses less digits than its factorization.

52005909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17335306.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 52005909 is about 7211.5122547216. The cubic root of 52005909 is about 373.2652532286.

The spelling of 52005909 in words is "fifty-two million, five thousand, nine hundred nine".