52438909 has 4 divisors (see below), whose sum is σ = 52459804. Its totient is φ = 52418016.

The previous prime is 52438891. The next prime is 52438921. The reversal of 52438909 is 90983425.

It is a happy number.

52438909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44156025 + 8282884 = 6645^2 + 2878^2 .

It is a cyclic number.

It is not a de Polignac number, because 52438909 - 2²³ = 44050301 is a prime.

It is a super-2 number, since 2×52438909² = 5499678354220562, 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 (52438979) 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 in 3 ways as a sum of consecutive naturals, for example, 6072 + ... + 11905.

It is an arithmetic number, because the mean of its divisors is an integer number (13114951).

Almost surely, 2^52438909 is an apocalyptic number.

It is an amenable number.

52438909 is a deficient number, since it is larger than the sum of its proper divisors (20895).

52438909 is a wasteful number, since it uses less digits than its factorization.

52438909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20894.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 52438909 is about 7241.4714664908. The cubic root of 52438909 is about 374.2983240359.

The spelling of 52438909 in words is "fifty-two million, four hundred thirty-eight thousand, nine hundred nine".