43400393 has 2 divisors, whose sum is σ = 43400394. Its totient is φ = 43400392.

The previous prime is 43400369. The next prime is 43400417. The reversal of 43400393 is 39300434.

43400393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (43400369) and next prime (43400417).

It can be written as a sum of positive squares in only one way, i.e., 30063289 + 13337104 = 5483^2 + 3652^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43400393 is a prime.

It is a super-2 number, since 2×43400393² = 3767188225108898, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (43400323) 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, 21700196 + 21700197.

It is an arithmetic number, because the mean of its divisors is an integer number (21700197).

Almost surely, 2^43400393 is an apocalyptic number.

It is an amenable number.

43400393 is a deficient number, since it is larger than the sum of its proper divisors (1).

43400393 is an equidigital number, since it uses as much as digits as its factorization.

43400393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 43400393 is about 6587.8974642901. The cubic root of 43400393 is about 351.4238406128.

The spelling of 43400393 in words is "forty-three million, four hundred thousand, three hundred ninety-three".