57709509 has 64 divisors (see below), whose sum is σ = 98558208. Its totient is φ = 29491200.

The previous prime is 57709489. The next prime is 57709537. The reversal of 57709509 is 90590775.

It is a happy number.

57709509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 57709509 - 2¹⁵ = 57676741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57709549) 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 in 63 ways as a sum of consecutive naturals, for example, 298917 + ... + 299109.

It is an arithmetic number, because the mean of its divisors is an integer number (1539972).

Almost surely, 2^57709509 is an apocalyptic number.

It is an amenable number.

57709509 is a deficient number, since it is larger than the sum of its proper divisors (40848699).

57709509 is a wasteful number, since it uses less digits than its factorization.

57709509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278.

The product of its (nonzero) digits is 99225, while the sum is 42.

The square root of 57709509 is about 7596.6774974327. The cubic root of 57709509 is about 386.4403437573.

The spelling of 57709509 in words is "fifty-seven million, seven hundred nine thousand, five hundred nine".