853868605 has 16 divisors (see below), whose sum is σ = 1122329520. Its totient is φ = 620741632.

The previous prime is 853868513. The next prime is 853868621. The reversal of 853868605 is 506868358.

It can be written as a sum of positive squares in 8 ways, for example, as 85137529 + 768731076 = 9227^2 + 27726^2 .

It is a cyclic number.

It is not a de Polignac number, because 853868605 - 2²⁹ = 316997693 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 170734 + ... + 175663.

It is an arithmetic number, because the mean of its divisors is an integer number (70145595).

Almost surely, 2^853868605 is an apocalyptic number.

853868605 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

853868605 is a deficient number, since it is larger than the sum of its proper divisors (268460915).

853868605 is a wasteful number, since it uses less digits than its factorization.

853868605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346448.

The product of its (nonzero) digits is 1382400, while the sum is 49.

The square root of 853868605 is about 29221.0301837564. The cubic root of 853868605 is about 948.7031630992.

The spelling of 853868605 in words is "eight hundred fifty-three million, eight hundred sixty-eight thousand, six hundred five".