864173853 has 12 divisors (see below), whose sum is σ = 1294483008. Its totient is φ = 576115740.

The previous prime is 864173777. The next prime is 864173897. The reversal of 864173853 is 358371468.

It is not a de Polignac number, because 864173853 - 2¹³ = 864165661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 864173799 and 864173808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864173753) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1777893 + ... + 1778378.

It is an arithmetic number, because the mean of its divisors is an integer number (107873584).

Almost surely, 2^864173853 is an apocalyptic number.

It is an amenable number.

864173853 is a deficient number, since it is larger than the sum of its proper divisors (430309155).

864173853 is an equidigital number, since it uses as much as digits as its factorization.

864173853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556286 (or 3556274 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 864173853 is about 29396.8340642322. The cubic root of 864173853 is about 952.5045098677.

The spelling of 864173853 in words is "eight hundred sixty-four million, one hundred seventy-three thousand, eight hundred fifty-three".