57303809 has 4 divisors (see below), whose sum is σ = 58275120. Its totient is φ = 56332500.

The previous prime is 57303803. The next prime is 57303839. The reversal of 57303809 is 90830375.

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 57303809 - 2⁴ = 57303793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57303803) 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, 485567 + ... + 485684.

It is an arithmetic number, because the mean of its divisors is an integer number (14568780).

Almost surely, 2^57303809 is an apocalyptic number.

57303809 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

57303809 is a deficient number, since it is larger than the sum of its proper divisors (971311).

57303809 is an equidigital number, since it uses as much as digits as its factorization.

57303809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971310.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 57303809 is about 7569.9279388908. The cubic root of 57303809 is about 385.5326500406.

The spelling of 57303809 in words is "fifty-seven million, three hundred three thousand, eight hundred nine".