57438847 has 2 divisors, whose sum is σ = 57438848. Its totient is φ = 57438846.

The previous prime is 57438811. The next prime is 57438851. The reversal of 57438847 is 74883475.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57438847 is a prime.

It is a super-2 number, since 2×57438847² = 6598442289378818, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 57438797 and 57438806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57438047) 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, 28719423 + 28719424.

It is an arithmetic number, because the mean of its divisors is an integer number (28719424).

Almost surely, 2^57438847 is an apocalyptic number.

57438847 is a deficient number, since it is larger than the sum of its proper divisors (1).

57438847 is an equidigital number, since it uses as much as digits as its factorization.

57438847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 752640, while the sum is 46.

The square root of 57438847 is about 7578.8420619512. The cubic root of 57438847 is about 385.8352518951.

It can be divided in two parts, 57438 and 847, that added together give a palindrome (58285).

The spelling of 57438847 in words is "fifty-seven million, four hundred thirty-eight thousand, eight hundred forty-seven".