853889819 has 2 divisors, whose sum is σ = 853889820. Its totient is φ = 853889818.

The previous prime is 853889683. The next prime is 853889851. The reversal of 853889819 is 918988358.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 853889819 - 2¹² = 853885723 is a prime.

It is a super-2 number, since 2×853889819² = 1458255645983705522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (853889899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426944909 + 426944910.

It is an arithmetic number, because the mean of its divisors is an integer number (426944910).

Almost surely, 2^853889819 is an apocalyptic number.

853889819 is a deficient number, since it is larger than the sum of its proper divisors (1).

853889819 is an equidigital number, since it uses as much as digits as its factorization.

853889819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 59.

The square root of 853889819 is about 29221.3931734953. The cubic root of 853889819 is about 948.7110197421.

The spelling of 853889819 in words is "eight hundred fifty-three million, eight hundred eighty-nine thousand, eight hundred nineteen".