43686457 has 2 divisors, whose sum is σ = 43686458. Its totient is φ = 43686456.

The previous prime is 43686403. The next prime is 43686463. The reversal of 43686457 is 75468634.

43686457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39175081 + 4511376 = 6259^2 + 2124^2 .

It is a cyclic number.

It is not a de Polignac number, because 43686457 - 2⁷ = 43686329 is a prime.

It is not a weakly prime, because it can be changed into another prime (43683457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21843228 + 21843229.

It is an arithmetic number, because the mean of its divisors is an integer number (21843229).

Almost surely, 2^43686457 is an apocalyptic number.

It is an amenable number.

43686457 is a deficient number, since it is larger than the sum of its proper divisors (1).

43686457 is an equidigital number, since it uses as much as digits as its factorization.

43686457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 43.

The square root of 43686457 is about 6609.5731329640. The cubic root of 43686457 is about 352.1942609925.

It can be divided in two parts, 436864 and 57, that added together give a square (436921 = 661²).

The spelling of 43686457 in words is "forty-three million, six hundred eighty-six thousand, four hundred fifty-seven".