42823717 has 2 divisors, whose sum is σ = 42823718. Its totient is φ = 42823716.

The previous prime is 42823709. The next prime is 42823733. The reversal of 42823717 is 71732824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31708161 + 11115556 = 5631^2 + 3334^2 .

It is a cyclic number.

It is not a de Polignac number, because 42823717 - 2³ = 42823709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42823747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21411858 + 21411859.

It is an arithmetic number, because the mean of its divisors is an integer number (21411859).

Almost surely, 2^42823717 is an apocalyptic number.

It is an amenable number.

42823717 is a deficient number, since it is larger than the sum of its proper divisors (1).

42823717 is an equidigital number, since it uses as much as digits as its factorization.

42823717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 34.

The square root of 42823717 is about 6543.9832670935. The cubic root of 42823717 is about 349.8603987477.

The spelling of 42823717 in words is "forty-two million, eight hundred twenty-three thousand, seven hundred seventeen".