57047387 has 2 divisors, whose sum is σ = 57047388. Its totient is φ = 57047386.

The previous prime is 57047357. The next prime is 57047411. The reversal of 57047387 is 78374075.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57047387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57047357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28523693 + 28523694.

It is an arithmetic number, because the mean of its divisors is an integer number (28523694).

Almost surely, 2^57047387 is an apocalyptic number.

57047387 is a deficient number, since it is larger than the sum of its proper divisors (1).

57047387 is an equidigital number, since it uses as much as digits as its factorization.

57047387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 164640, while the sum is 41.

The square root of 57047387 is about 7552.9720640288. The cubic root of 57047387 is about 384.9567320803.

The spelling of 57047387 in words is "fifty-seven million, forty-seven thousand, three hundred eighty-seven".