57709909 has 2 divisors, whose sum is σ = 57709910. Its totient is φ = 57709908.

The previous prime is 57709907. The next prime is 57709957. The reversal of 57709909 is 90990775.

57709909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34187409 + 23522500 = 5847^2 + 4850^2 .

It is a cyclic number.

It is not a de Polignac number, because 57709909 - 2¹ = 57709907 is a prime.

Together with 57709907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57709901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28854954 + 28854955.

It is an arithmetic number, because the mean of its divisors is an integer number (28854955).

Almost surely, 2^57709909 is an apocalyptic number.

It is an amenable number.

57709909 is a deficient number, since it is larger than the sum of its proper divisors (1).

57709909 is an equidigital number, since it uses as much as digits as its factorization.

57709909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 178605, while the sum is 46.

The square root of 57709909 is about 7596.7038246861. The cubic root of 57709909 is about 386.4412365956.

The spelling of 57709909 in words is "fifty-seven million, seven hundred nine thousand, nine hundred nine".