43868399 has 2 divisors, whose sum is σ = 43868400. Its totient is φ = 43868398.

The previous prime is 43868393. The next prime is 43868453. The reversal of 43868399 is 99386834.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43868399 - 2²⁰ = 42819823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43868393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21934199 + 21934200.

It is an arithmetic number, because the mean of its divisors is an integer number (21934200).

Almost surely, 2^43868399 is an apocalyptic number.

43868399 is a deficient number, since it is larger than the sum of its proper divisors (1).

43868399 is an equidigital number, since it uses as much as digits as its factorization.

43868399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 50.

The square root of 43868399 is about 6623.3223536228. The cubic root of 43868399 is about 352.6825143391.

The spelling of 43868399 in words is "forty-three million, eight hundred sixty-eight thousand, three hundred ninety-nine".