57928309 has 2 divisors, whose sum is σ = 57928310. Its totient is φ = 57928308.

The previous prime is 57928307. The next prime is 57928349. The reversal of 57928309 is 90382975.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39627025 + 18301284 = 6295^2 + 4278^2 .

It is a cyclic number.

It is not a de Polignac number, because 57928309 - 2¹ = 57928307 is a prime.

Together with 57928307, 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 (57928301) 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 as a sum of consecutive naturals, namely, 28964154 + 28964155.

It is an arithmetic number, because the mean of its divisors is an integer number (28964155).

Almost surely, 2^57928309 is an apocalyptic number.

It is an amenable number.

57928309 is a deficient number, since it is larger than the sum of its proper divisors (1).

57928309 is an equidigital number, since it uses as much as digits as its factorization.

57928309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 57928309 is about 7611.0649057803. The cubic root of 57928309 is about 386.9281115148.

The spelling of 57928309 in words is "fifty-seven million, nine hundred twenty-eight thousand, three hundred nine".