53731009 has 4 divisors (see below), whose sum is σ = 53815216. Its totient is φ = 53646804.

The previous prime is 53731003. The next prime is 53731019. The reversal of 53731009 is 90013735.

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 a cyclic number.

It is not a de Polignac number, because 53731009 - 2³ = 53731001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53731001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41139 + ... + 42424.

It is an arithmetic number, because the mean of its divisors is an integer number (13453804).

Almost surely, 2^53731009 is an apocalyptic number.

It is an amenable number.

53731009 is a deficient number, since it is larger than the sum of its proper divisors (84207).

53731009 is an equidigital number, since it uses as much as digits as its factorization.

53731009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84206.

The product of its (nonzero) digits is 2835, while the sum is 28.

The square root of 53731009 is about 7330.1438594341. The cubic root of 53731009 is about 377.3476636342.

The spelling of 53731009 in words is "fifty-three million, seven hundred thirty-one thousand, nine".