863209071 has 6 divisors (see below), whose sum is σ = 1246857560. Its totient is φ = 575472708.

The previous prime is 863209049. The next prime is 863209073. The reversal of 863209071 is 170902368.

It is not a de Polignac number, because 863209071 - 2⁹ = 863208559 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 (863209073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47956051 + ... + 47956068.

Almost surely, 2^863209071 is an apocalyptic number.

863209071 is a deficient number, since it is larger than the sum of its proper divisors (383648489).

863209071 is a wasteful number, since it uses less digits than its factorization.

863209071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95912125 (or 95912122 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 863209071 is about 29380.4198574493. The cubic root of 863209071 is about 952.1499124693.

The spelling of 863209071 in words is "eight hundred sixty-three million, two hundred nine thousand, seventy-one".