853236389 has 2 divisors, whose sum is σ = 853236390. Its totient is φ = 853236388.

The previous prime is 853236379. The next prime is 853236407. The reversal of 853236389 is 983632358.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 808947364 + 44289025 = 28442^2 + 6655^2 .

It is a cyclic number.

It is not a de Polignac number, because 853236389 - 2¹⁶ = 853170853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853236379) 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, 426618194 + 426618195.

It is an arithmetic number, because the mean of its divisors is an integer number (426618195).

Almost surely, 2^853236389 is an apocalyptic number.

It is an amenable number.

853236389 is a deficient number, since it is larger than the sum of its proper divisors (1).

853236389 is an equidigital number, since it uses as much as digits as its factorization.

853236389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 47.

The square root of 853236389 is about 29210.2103552850. The cubic root of 853236389 is about 948.4689610193.

The spelling of 853236389 in words is "eight hundred fifty-three million, two hundred thirty-six thousand, three hundred eighty-nine".