853219957 has 2 divisors, whose sum is σ = 853219958. Its totient is φ = 853219956.

The previous prime is 853219907. The next prime is 853219973. The reversal of 853219957 is 759912358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 574129521 + 279090436 = 23961^2 + 16706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-853219957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 853219957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853219907) 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, 426609978 + 426609979.

It is an arithmetic number, because the mean of its divisors is an integer number (426609979).

Almost surely, 2^853219957 is an apocalyptic number.

It is an amenable number.

853219957 is a deficient number, since it is larger than the sum of its proper divisors (1).

853219957 is an equidigital number, since it uses as much as digits as its factorization.

853219957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 49.

The square root of 853219957 is about 29209.9290824199. The cubic root of 853219957 is about 948.4628723034.

The spelling of 853219957 in words is "eight hundred fifty-three million, two hundred nineteen thousand, nine hundred fifty-seven".