43420823 has 2 divisors, whose sum is σ = 43420824. Its totient is φ = 43420822.

The previous prime is 43420813. The next prime is 43420829. The reversal of 43420823 is 32802434.

43420823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43420823 - 2¹² = 43416727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43420792 and 43420801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43420829) 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, 21710411 + 21710412.

It is an arithmetic number, because the mean of its divisors is an integer number (21710412).

Almost surely, 2^43420823 is an apocalyptic number.

43420823 is a deficient number, since it is larger than the sum of its proper divisors (1).

43420823 is an equidigital number, since it uses as much as digits as its factorization.

43420823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 43420823 is about 6589.4478524380. The cubic root of 43420823 is about 351.4789742365.

The spelling of 43420823 in words is "forty-three million, four hundred twenty thousand, eight hundred twenty-three".