57478009 has 2 divisors, whose sum is σ = 57478010. Its totient is φ = 57478008.

The previous prime is 57478007. The next prime is 57478019. The reversal of 57478009 is 90087475.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57456400 + 21609 = 7580^2 + 147^2 .

It is a cyclic number.

It is not a de Polignac number, because 57478009 - 2¹ = 57478007 is a prime.

Together with 57478007, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57478007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28739004 + 28739005.

It is an arithmetic number, because the mean of its divisors is an integer number (28739005).

Almost surely, 2^57478009 is an apocalyptic number.

It is an amenable number.

57478009 is a deficient number, since it is larger than the sum of its proper divisors (1).

57478009 is an equidigital number, since it uses as much as digits as its factorization.

57478009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 57478009 is about 7581.4252617829. The cubic root of 57478009 is about 385.9229199003.

The spelling of 57478009 in words is "fifty-seven million, four hundred seventy-eight thousand, nine".