57668321 has 4 divisors (see below), whose sum is σ = 58458372. Its totient is φ = 56878272.

The previous prime is 57668309. The next prime is 57668329. The reversal of 57668321 is 12386675.

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 16516096 + 41152225 = 4064^2 + 6415^2 .

It is a cyclic number.

It is not a de Polignac number, because 57668321 - 2⁶ = 57668257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57668329) by changing a digit.

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, 394916 + ... + 395061.

It is an arithmetic number, because the mean of its divisors is an integer number (14614593).

Almost surely, 2^57668321 is an apocalyptic number.

It is an amenable number.

57668321 is a deficient number, since it is larger than the sum of its proper divisors (790051).

57668321 is an equidigital number, since it uses as much as digits as its factorization.

57668321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790050.

The product of its digits is 60480, while the sum is 38.

The square root of 57668321 is about 7593.9660915756. The cubic root of 57668321 is about 386.3483861042.

The spelling of 57668321 in words is "fifty-seven million, six hundred sixty-eight thousand, three hundred twenty-one".