43645373 has 2 divisors, whose sum is σ = 43645374. Its totient is φ = 43645372.

The previous prime is 43645351. The next prime is 43645379. The reversal of 43645373 is 37354634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26646244 + 16999129 = 5162^2 + 4123^2 .

It is a cyclic number.

It is not a de Polignac number, because 43645373 - 2¹⁴ = 43628989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43645379) 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, 21822686 + 21822687.

It is an arithmetic number, because the mean of its divisors is an integer number (21822687).

Almost surely, 2^43645373 is an apocalyptic number.

It is an amenable number.

43645373 is a deficient number, since it is larger than the sum of its proper divisors (1).

43645373 is an equidigital number, since it uses as much as digits as its factorization.

43645373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 35.

The square root of 43645373 is about 6606.4644856383. The cubic root of 43645373 is about 352.0838218294.

The spelling of 43645373 in words is "forty-three million, six hundred forty-five thousand, three hundred seventy-three".