53439445 has 4 divisors (see below), whose sum is σ = 64127340. Its totient is φ = 42751552.

The previous prime is 53439437. The next prime is 53439461. The reversal of 53439445 is 54493435.

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 12453841 + 40985604 = 3529^2 + 6402^2 .

It is a cyclic number.

It is not a de Polignac number, because 53439445 - 2³ = 53439437 is a prime.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5343940 + ... + 5343949.

It is an arithmetic number, because the mean of its divisors is an integer number (16031835).

Almost surely, 2^53439445 is an apocalyptic number.

It is an amenable number.

53439445 is a deficient number, since it is larger than the sum of its proper divisors (10687895).

53439445 is a wasteful number, since it uses less digits than its factorization.

53439445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10687894.

The product of its digits is 129600, while the sum is 37.

The square root of 53439445 is about 7310.2287925892. The cubic root of 53439445 is about 376.6638834298.

The spelling of 53439445 in words is "fifty-three million, four hundred thirty-nine thousand, four hundred forty-five".