864197 has 4 divisors (see below), whose sum is σ = 868140. Its totient is φ = 860256.

The previous prime is 864191. The next prime is 864203. The reversal of 864197 is 791468.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (864191) and next prime (864203).

It can be written as a sum of positive squares in 2 ways, for example, as 201601 + 662596 = 449^2 + 814^2 .

It is a cyclic number.

It is not a de Polignac number, because 864197 - 2¹⁴ = 847813 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 (864191) 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, 1622 + ... + 2087.

It is an arithmetic number, because the mean of its divisors is an integer number (217035).

2⁸⁶⁴¹⁹⁷ is an apocalyptic number.

It is an amenable number.

864197 is a deficient number, since it is larger than the sum of its proper divisors (3943).

864197 is a wasteful number, since it uses less digits than its factorization.

864197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942.

The product of its digits is 12096, while the sum is 35.

The square root of 864197 is about 929.6219661777. The cubic root of 864197 is about 95.2513014107.

The spelling of 864197 in words is "eight hundred sixty-four thousand, one hundred ninety-seven".