57047789 has 2 divisors, whose sum is σ = 57047790. Its totient is φ = 57047788.

The previous prime is 57047743. The next prime is 57047791. The reversal of 57047789 is 98774075.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47375689 + 9672100 = 6883^2 + 3110^2 .

It is a cyclic number.

It is not a de Polignac number, because 57047789 - 2¹⁶ = 56982253 is a prime.

Together with 57047791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57007789) 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, 28523894 + 28523895.

It is an arithmetic number, because the mean of its divisors is an integer number (28523895).

Almost surely, 2^57047789 is an apocalyptic number.

It is an amenable number.

57047789 is a deficient number, since it is larger than the sum of its proper divisors (1).

57047789 is an equidigital number, since it uses as much as digits as its factorization.

57047789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 47.

The square root of 57047789 is about 7552.9986760227. The cubic root of 57047789 is about 384.9576363124.

The spelling of 57047789 in words is "fifty-seven million, forty-seven thousand, seven hundred eighty-nine".