863217073 has 4 divisors (see below), whose sum is σ = 863276148. Its totient is φ = 863158000.

The previous prime is 863217049. The next prime is 863217097. The reversal of 863217073 is 370712368.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (863217049) and next prime (863217097).

It can be written as a sum of positive squares in 2 ways, for example, as 105206049 + 758011024 = 10257^2 + 27532^2 .

It is a cyclic number.

It is not a de Polignac number, because 863217073 - 2⁹ = 863216561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863217013) 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 3 ways as a sum of consecutive naturals, for example, 10215 + ... + 42787.

It is an arithmetic number, because the mean of its divisors is an integer number (215819037).

Almost surely, 2^863217073 is an apocalyptic number.

It is an amenable number.

863217073 is a deficient number, since it is larger than the sum of its proper divisors (59075).

863217073 is a wasteful number, since it uses less digits than its factorization.

863217073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59074.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 863217073 is about 29380.5560362632. The cubic root of 863217073 is about 952.1528546225.

The spelling of 863217073 in words is "eight hundred sixty-three million, two hundred seventeen thousand, seventy-three".