43591057 has 2 divisors, whose sum is σ = 43591058. Its totient is φ = 43591056.

The previous prime is 43591039. The next prime is 43591063. The reversal of 43591057 is 75019534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40436881 + 3154176 = 6359^2 + 1776^2 .

It is a cyclic number.

It is not a de Polignac number, because 43591057 - 2²³ = 35202449 is a prime.

It is not a weakly prime, because it can be changed into another prime (43591087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21795528 + 21795529.

It is an arithmetic number, because the mean of its divisors is an integer number (21795529).

Almost surely, 2^43591057 is an apocalyptic number.

It is an amenable number.

43591057 is a deficient number, since it is larger than the sum of its proper divisors (1).

43591057 is an equidigital number, since it uses as much as digits as its factorization.

43591057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 43591057 is about 6602.3523838099. The cubic root of 43591057 is about 351.9377068873.

The spelling of 43591057 in words is "forty-three million, five hundred ninety-one thousand, fifty-seven".