43423019 has 2 divisors, whose sum is σ = 43423020. Its totient is φ = 43423018.

The previous prime is 43423013. The next prime is 43423043. The reversal of 43423019 is 91032434.

43423019 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 is a cyclic number.

It is not a de Polignac number, because 43423019 - 2⁸ = 43422763 is a prime.

It is a super-2 number, since 2×43423019² = 3771117158148722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43423013) 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, 21711509 + 21711510.

It is an arithmetic number, because the mean of its divisors is an integer number (21711510).

Almost surely, 2^43423019 is an apocalyptic number.

43423019 is a deficient number, since it is larger than the sum of its proper divisors (1).

43423019 is an equidigital number, since it uses as much as digits as its factorization.

43423019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 43423019 is about 6589.6144803774. The cubic root of 43423019 is about 351.4848994644.

The spelling of 43423019 in words is "forty-three million, four hundred twenty-three thousand, nineteen".