8197385605 has 4 divisors (see below), whose sum is σ = 9836862732. Its totient is φ = 6557908480.

The previous prime is 8197385597. The next prime is 8197385629. The reversal of 8197385605 is 5065837918.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5065837918 = 2 ⋅2532918959.

It can be written as a sum of positive squares in 2 ways, for example, as 4065210081 + 4132175524 = 63759^2 + 64282^2 .

It is not a de Polignac number, because 8197385605 - 2³ = 8197385597 is a prime.

It is a super-2 number, since 2×8197385605² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819738556 + ... + 819738565.

It is an arithmetic number, because the mean of its divisors is an integer number (2459215683).

Almost surely, 2^8197385605 is an apocalyptic number.

It is an amenable number.

8197385605 is a deficient number, since it is larger than the sum of its proper divisors (1639477127).

8197385605 is a wasteful number, since it uses less digits than its factorization.

8197385605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639477126.

The product of its (nonzero) digits is 1814400, while the sum is 52.

The square root of 8197385605 is about 90539.4146490908. The cubic root of 8197385605 is about 2016.3153432877.

The spelling of 8197385605 in words is "eight billion, one hundred ninety-seven million, three hundred eighty-five thousand, six hundred five".