860520853 has 4 divisors (see below), whose sum is σ = 869392300. Its totient is φ = 851649408.

The previous prime is 860520821. The next prime is 860520863. The reversal of 860520853 is 358025068.

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 426298609 + 434222244 = 20647^2 + 20838^2 .

It is a cyclic number.

It is not a de Polignac number, because 860520853 - 2⁵ = 860520821 is a prime.

It is a super-2 number, since 2×860520853² = 1480992276895695218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (860520863) 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 3 ways as a sum of consecutive naturals, for example, 4435578 + ... + 4435771.

It is an arithmetic number, because the mean of its divisors is an integer number (217348075).

Almost surely, 2^860520853 is an apocalyptic number.

It is an amenable number.

860520853 is a deficient number, since it is larger than the sum of its proper divisors (8871447).

860520853 is an equidigital number, since it uses as much as digits as its factorization.

860520853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8871446.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 860520853 is about 29334.6357229811. The cubic root of 860520853 is about 951.1604850487.

The spelling of 860520853 in words is "eight hundred sixty million, five hundred twenty thousand, eight hundred fifty-three".