57140647 has 2 divisors, whose sum is σ = 57140648. Its totient is φ = 57140646.

The previous prime is 57140623. The next prime is 57140651. The reversal of 57140647 is 74604175.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57140647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57140747) 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, 28570323 + 28570324.

It is an arithmetic number, because the mean of its divisors is an integer number (28570324).

Almost surely, 2^57140647 is an apocalyptic number.

57140647 is a deficient number, since it is larger than the sum of its proper divisors (1).

57140647 is an equidigital number, since it uses as much as digits as its factorization.

57140647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 57140647 is about 7559.1432715619. The cubic root of 57140647 is about 385.1663912251.

The spelling of 57140647 in words is "fifty-seven million, one hundred forty thousand, six hundred forty-seven".