42853817 has 2 divisors, whose sum is σ = 42853818. Its totient is φ = 42853816.

The previous prime is 42853799. The next prime is 42853819. The reversal of 42853817 is 71835824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36192256 + 6661561 = 6016^2 + 2581^2 .

It is a cyclic number.

It is not a de Polignac number, because 42853817 - 2¹² = 42849721 is a prime.

Together with 42853819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42853819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21426908 + 21426909.

It is an arithmetic number, because the mean of its divisors is an integer number (21426909).

Almost surely, 2^42853817 is an apocalyptic number.

It is an amenable number.

42853817 is a deficient number, since it is larger than the sum of its proper divisors (1).

42853817 is an equidigital number, since it uses as much as digits as its factorization.

42853817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 38.

The square root of 42853817 is about 6546.2826856163. The cubic root of 42853817 is about 349.9423496883.

It can be divided in two parts, 428 and 53817, that added together give a palindrome (54245).

The spelling of 42853817 in words is "forty-two million, eight hundred fifty-three thousand, eight hundred seventeen".