864212949 has 8 divisors (see below), whose sum is σ = 1280315520. Its totient is φ = 576141948.

The previous prime is 864212941. The next prime is 864212953. The reversal of 864212949 is 949212468.

It is not a de Polignac number, because 864212949 - 2³ = 864212941 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864212941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16003917 + ... + 16003970.

It is an arithmetic number, because the mean of its divisors is an integer number (160039440).

Almost surely, 2^864212949 is an apocalyptic number.

It is an amenable number.

864212949 is a deficient number, since it is larger than the sum of its proper divisors (416102571).

864212949 is a wasteful number, since it uses less digits than its factorization.

864212949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32007896 (or 32007890 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 864212949 is about 29397.4990262777. The cubic root of 864212949 is about 952.5188737038.

The spelling of 864212949 in words is "eight hundred sixty-four million, two hundred twelve thousand, nine hundred forty-nine".