865197005 has 8 divisors (see below), whose sum is σ = 1039304952. Its totient is φ = 691445248.

The previous prime is 865197001. The next prime is 865197017. The reversal of 865197005 is 500791568.

It can be written as a sum of positive squares in 4 ways, for example, as 260725609 + 604471396 = 16147^2 + 24586^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 865197005 - 2² = 865197001 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 (865197001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83672 + ... + 93441.

It is an arithmetic number, because the mean of its divisors is an integer number (129913119).

Almost surely, 2^865197005 is an apocalyptic number.

It is an amenable number.

865197005 is a deficient number, since it is larger than the sum of its proper divisors (174107947).

865197005 is a wasteful number, since it uses less digits than its factorization.

865197005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178095.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 865197005 is about 29414.2313345088. The cubic root of 865197005 is about 952.8802724259.

The spelling of 865197005 in words is "eight hundred sixty-five million, one hundred ninety-seven thousand, five".