57647971 has 2 divisors, whose sum is σ = 57647972. Its totient is φ = 57647970.

The previous prime is 57647929. The next prime is 57647977. The reversal of 57647971 is 17974675.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57647971 - 2¹⁹ = 57123683 is a prime.

It is not a weakly prime, because it can be changed into another prime (57647977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28823985 + 28823986.

It is an arithmetic number, because the mean of its divisors is an integer number (28823986).

Almost surely, 2^57647971 is an apocalyptic number.

57647971 is a deficient number, since it is larger than the sum of its proper divisors (1).

57647971 is an equidigital number, since it uses as much as digits as its factorization.

57647971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 370440, while the sum is 46.

The square root of 57647971 is about 7592.6260937834. The cubic root of 57647971 is about 386.3029358783.

The spelling of 57647971 in words is "fifty-seven million, six hundred forty-seven thousand, nine hundred seventy-one".