57783247 has 2 divisors, whose sum is σ = 57783248. Its totient is φ = 57783246.

The previous prime is 57783241. The next prime is 57783259. The reversal of 57783247 is 74238775.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57783247 - 2¹⁹ = 57258959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57783241) 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, 28891623 + 28891624.

It is an arithmetic number, because the mean of its divisors is an integer number (28891624).

Almost surely, 2^57783247 is an apocalyptic number.

57783247 is a deficient number, since it is larger than the sum of its proper divisors (1).

57783247 is an equidigital number, since it uses as much as digits as its factorization.

57783247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 329280, while the sum is 43.

The square root of 57783247 is about 7601.5292540383. The cubic root of 57783247 is about 386.6048643628.

It can be divided in two parts, 5778 and 3247, that added together give a square (9025 = 95²).

The spelling of 57783247 in words is "fifty-seven million, seven hundred eighty-three thousand, two hundred forty-seven".