853164643 has 2 divisors, whose sum is σ = 853164644. Its totient is φ = 853164642.

The previous prime is 853164589. The next prime is 853164661. The reversal of 853164643 is 346461358.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-853164643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 853164596 and 853164605.

It is not a weakly prime, because it can be changed into another prime (853164443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426582321 + 426582322.

It is an arithmetic number, because the mean of its divisors is an integer number (426582322).

Almost surely, 2^853164643 is an apocalyptic number.

853164643 is a deficient number, since it is larger than the sum of its proper divisors (1).

853164643 is an equidigital number, since it uses as much as digits as its factorization.

853164643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 40.

The square root of 853164643 is about 29208.9822314986. The cubic root of 853164643 is about 948.4423756704.

The spelling of 853164643 in words is "eight hundred fifty-three million, one hundred sixty-four thousand, six hundred forty-three".