8685598213 has 4 divisors (see below), whose sum is σ = 8762462028. Its totient is φ = 8608734400.

The previous prime is 8685598177. The next prime is 8685598241. The reversal of 8685598213 is 3128955868.

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 3093250689 + 5592347524 = 55617^2 + 74782^2 .

It is a cyclic number.

It is not a de Polignac number, because 8685598213 - 2²¹ = 8683501061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8685595213) 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, 38431738 + ... + 38431963.

It is an arithmetic number, because the mean of its divisors is an integer number (2190615507).

Almost surely, 2^8685598213 is an apocalyptic number.

It is an amenable number.

8685598213 is a deficient number, since it is larger than the sum of its proper divisors (76863815).

8685598213 is a wasteful number, since it uses less digits than its factorization.

8685598213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76863814.

The product of its digits is 4147200, while the sum is 55.

The square root of 8685598213 is about 93196.5568730948. The cubic root of 8685598213 is about 2055.5746119789.

The spelling of 8685598213 in words is "eight billion, six hundred eighty-five million, five hundred ninety-eight thousand, two hundred thirteen".