853971917 has 2 divisors, whose sum is σ = 853971918. Its totient is φ = 853971916.

The previous prime is 853971913. The next prime is 853971949. The reversal of 853971917 is 719179358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 800550436 + 53421481 = 28294^2 + 7309^2 .

It is a cyclic number.

It is not a de Polignac number, because 853971917 - 2² = 853971913 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853971913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426985958 + 426985959.

It is an arithmetic number, because the mean of its divisors is an integer number (426985959).

Almost surely, 2^853971917 is an apocalyptic number.

It is an amenable number.

853971917 is a deficient number, since it is larger than the sum of its proper divisors (1).

853971917 is an equidigital number, since it uses as much as digits as its factorization.

853971917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 50.

The square root of 853971917 is about 29222.7978982164. The cubic root of 853971917 is about 948.7414236574.

The spelling of 853971917 in words is "eight hundred fifty-three million, nine hundred seventy-one thousand, nine hundred seventeen".