853565979 has 16 divisors (see below), whose sum is σ = 1302884352. Its totient is φ = 486922368.

The previous prime is 853565969. The next prime is 853565983. The reversal of 853565979 is 979565358.

It is not a de Polignac number, because 853565979 - 2¹⁵ = 853533211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (853565959) 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, 21819 + ... + 46724.

It is an arithmetic number, because the mean of its divisors is an integer number (81430272).

Almost surely, 2^853565979 is an apocalyptic number.

853565979 is a deficient number, since it is larger than the sum of its proper divisors (449318373).

853565979 is a wasteful number, since it uses less digits than its factorization.

853565979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69146.

The product of its digits is 10206000, while the sum is 57.

The square root of 853565979 is about 29215.8515022239. The cubic root of 853565979 is about 948.5910708458.

The spelling of 853565979 in words is "eight hundred fifty-three million, five hundred sixty-five thousand, nine hundred seventy-nine".