864449197 has 4 divisors (see below), whose sum is σ = 894257820. Its totient is φ = 834640576.

The previous prime is 864449191. The next prime is 864449231. The reversal of 864449197 is 791944468.

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 149475076 + 714974121 = 12226^2 + 26739^2 .

It is a cyclic number.

It is not a de Polignac number, because 864449197 - 2³ = 864449189 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 (864449191) 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, 14904268 + ... + 14904325.

It is an arithmetic number, because the mean of its divisors is an integer number (223564455).

Almost surely, 2^864449197 is an apocalyptic number.

It is an amenable number.

864449197 is a deficient number, since it is larger than the sum of its proper divisors (29808623).

864449197 is a wasteful number, since it uses less digits than its factorization.

864449197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29808622.

The product of its digits is 1741824, while the sum is 52.

The square root of 864449197 is about 29401.5169166490. The cubic root of 864449197 is about 952.6056617949.

The spelling of 864449197 in words is "eight hundred sixty-four million, four hundred forty-nine thousand, one hundred ninety-seven".