43648057 has 2 divisors, whose sum is σ = 43648058. Its totient is φ = 43648056.

The previous prime is 43648051. The next prime is 43648091. The reversal of 43648057 is 75084634.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43283241 + 364816 = 6579^2 + 604^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43648057 is a prime.

It is not a weakly prime, because it can be changed into another prime (43648051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21824028 + 21824029.

It is an arithmetic number, because the mean of its divisors is an integer number (21824029).

Almost surely, 2^43648057 is an apocalyptic number.

It is an amenable number.

43648057 is a deficient number, since it is larger than the sum of its proper divisors (1).

43648057 is an equidigital number, since it uses as much as digits as its factorization.

43648057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 43648057 is about 6606.6676168852. The cubic root of 43648057 is about 352.0910388877.

It can be divided in two parts, 4364 and 8057, that added together give a palindrome (12421).

The spelling of 43648057 in words is "forty-three million, six hundred forty-eight thousand, fifty-seven".