853640459 has 16 divisors (see below), whose sum is σ = 1031632896. Its totient is φ = 690811200.

The previous prime is 853640453. The next prime is 853640507. The reversal of 853640459 is 954046358.

It is a cyclic number.

It is not a de Polignac number, because 853640459 - 2⁴ = 853640443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (853640453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39077 + ... + 56870.

It is an arithmetic number, because the mean of its divisors is an integer number (64477056).

Almost surely, 2^853640459 is an apocalyptic number.

853640459 is a deficient number, since it is larger than the sum of its proper divisors (177992437).

853640459 is a wasteful number, since it uses less digits than its factorization.

853640459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96026.

The product of its (nonzero) digits is 518400, while the sum is 44.

The square root of 853640459 is about 29217.1261249289. The cubic root of 853640459 is about 948.6186605927.

The spelling of 853640459 in words is "eight hundred fifty-three million, six hundred forty thousand, four hundred fifty-nine".