864643083 has 4 divisors (see below), whose sum is σ = 1152857448. Its totient is φ = 576428720.

The previous prime is 864643081. The next prime is 864643093. The reversal of 864643083 is 380346468.

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

It is a cyclic number.

It is not a de Polignac number, because 864643083 - 2¹ = 864643081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (864643081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144107178 + ... + 144107183.

It is an arithmetic number, because the mean of its divisors is an integer number (288214362).

Almost surely, 2^864643083 is an apocalyptic number.

864643083 is a deficient number, since it is larger than the sum of its proper divisors (288214365).

864643083 is a wasteful number, since it uses less digits than its factorization.

864643083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288214364.

The product of its (nonzero) digits is 331776, while the sum is 42.

The square root of 864643083 is about 29404.8139426183. The cubic root of 864643083 is about 952.6768759643.

The spelling of 864643083 in words is "eight hundred sixty-four million, six hundred forty-three thousand, eighty-three".