43404397 has 2 divisors, whose sum is σ = 43404398. Its totient is φ = 43404396.

The previous prime is 43404391. The next prime is 43404421. The reversal of 43404397 is 79340434.

43404397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40373316 + 3031081 = 6354^2 + 1741^2 .

It is a cyclic number.

It is not a de Polignac number, because 43404397 - 2¹¹ = 43402349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43404391) 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, 21702198 + 21702199.

It is an arithmetic number, because the mean of its divisors is an integer number (21702199).

Almost surely, 2^43404397 is an apocalyptic number.

It is an amenable number.

43404397 is a deficient number, since it is larger than the sum of its proper divisors (1).

43404397 is an equidigital number, since it uses as much as digits as its factorization.

43404397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 43404397 is about 6588.2013478642. The cubic root of 43404397 is about 351.4346474104.

The spelling of 43404397 in words is "forty-three million, four hundred four thousand, three hundred ninety-seven".