853489645 has 4 divisors (see below), whose sum is σ = 1024187580. Its totient is φ = 682791712.

The previous prime is 853489643. The next prime is 853489699. The reversal of 853489645 is 546984358.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 607031044 + 246458601 = 24638^2 + 15699^2 .

It is a cyclic number.

It is not a de Polignac number, because 853489645 - 2¹ = 853489643 is a prime.

It is a super-3 number, since 3×853489645³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 853489592 and 853489601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853489643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85348960 + ... + 85348969.

It is an arithmetic number, because the mean of its divisors is an integer number (256046895).

Almost surely, 2^853489645 is an apocalyptic number.

It is an amenable number.

853489645 is a deficient number, since it is larger than the sum of its proper divisors (170697935).

853489645 is a wasteful number, since it uses less digits than its factorization.

853489645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170697934.

The product of its digits is 4147200, while the sum is 52.

The square root of 853489645 is about 29214.5450931552. The cubic root of 853489645 is about 948.5627926532.

The spelling of 853489645 in words is "eight hundred fifty-three million, four hundred eighty-nine thousand, six hundred forty-five".