42877817 has 2 divisors, whose sum is σ = 42877818. Its totient is φ = 42877816.

The previous prime is 42877811. The next prime is 42877847. The reversal of 42877817 is 71877824.

42877817 is nontrivially palindromic in base 13.

42877817 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., 28047616 + 14830201 = 5296^2 + 3851^2 .

It is a cyclic number.

It is not a de Polignac number, because 42877817 - 2⁴ = 42877801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42877811) 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, 21438908 + 21438909.

It is an arithmetic number, because the mean of its divisors is an integer number (21438909).

Almost surely, 2^42877817 is an apocalyptic number.

It is an amenable number.

42877817 is a deficient number, since it is larger than the sum of its proper divisors (1).

42877817 is an equidigital number, since it uses as much as digits as its factorization.

42877817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 175616, while the sum is 44.

The square root of 42877817 is about 6548.1155304408. The cubic root of 42877817 is about 350.0076651383.

The spelling of 42877817 in words is "forty-two million, eight hundred seventy-seven thousand, eight hundred seventeen".