57947409 has 12 divisors (see below), whose sum is σ = 90140596. Its totient is φ = 35659872.

The previous prime is 57947399. The next prime is 57947443. The reversal of 57947409 is 90474975.

57947409 is a `hidden beast` number, since 579 + 4 + 74 + 0 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2772225 + 55175184 = 1665^2 + 7428^2 .

It is not a de Polignac number, because 57947409 - 2²¹ = 55850257 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57947209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247522 + ... + 247755.

Almost surely, 2^57947409 is an apocalyptic number.

It is an amenable number.

57947409 is a deficient number, since it is larger than the sum of its proper divisors (32193187).

57947409 is a wasteful number, since it uses less digits than its factorization.

57947409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495296 (or 495293 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 57947409 is about 7612.3195545116. The cubic root of 57947409 is about 386.9706325491.

It can be divided in two parts, 5794 and 7409, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 57947409 in words is "fifty-seven million, nine hundred forty-seven thousand, four hundred nine".