57147823 has 2 divisors, whose sum is σ = 57147824. Its totient is φ = 57147822.

The previous prime is 57147793. The next prime is 57147859. The reversal of 57147823 is 32874175.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57147823 - 2⁵ = 57147791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57147323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28573911 + 28573912.

It is an arithmetic number, because the mean of its divisors is an integer number (28573912).

Almost surely, 2^57147823 is an apocalyptic number.

57147823 is a deficient number, since it is larger than the sum of its proper divisors (1).

57147823 is an equidigital number, since it uses as much as digits as its factorization.

57147823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 37.

The square root of 57147823 is about 7559.6179136250. The cubic root of 57147823 is about 385.1825142389.

It can be divided in two parts, 57147 and 823, that added together give a triangular number (57970 = T₃₄₀).

The spelling of 57147823 in words is "fifty-seven million, one hundred forty-seven thousand, eight hundred twenty-three".