57704021 has 2 divisors, whose sum is σ = 57704022. Its totient is φ = 57704020.

The previous prime is 57703981. The next prime is 57704029. The reversal of 57704021 is 12040775.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39513796 + 18190225 = 6286^2 + 4265^2 .

It is a cyclic number.

It is not a de Polignac number, because 57704021 - 2⁶ = 57703957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57704029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28852010 + 28852011.

It is an arithmetic number, because the mean of its divisors is an integer number (28852011).

Almost surely, 2^57704021 is an apocalyptic number.

It is an amenable number.

57704021 is a deficient number, since it is larger than the sum of its proper divisors (1).

57704021 is an equidigital number, since it uses as much as digits as its factorization.

57704021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 57704021 is about 7596.3162783023. The cubic root of 57704021 is about 386.4280935991.

Adding to 57704021 its reverse (12040775), we get a palindrome (69744796).

The spelling of 57704021 in words is "fifty-seven million, seven hundred four thousand, twenty-one".