863706847 has 4 divisors (see below), whose sum is σ = 864545616. Its totient is φ = 862868080.

The previous prime is 863706821. The next prime is 863706871. The reversal of 863706847 is 748607368.

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 863706847 - 2⁷ = 863706719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 863706847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863706647) 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, 417838 + ... + 419899.

It is an arithmetic number, because the mean of its divisors is an integer number (216136404).

Almost surely, 2^863706847 is an apocalyptic number.

863706847 is a deficient number, since it is larger than the sum of its proper divisors (838769).

863706847 is a wasteful number, since it uses less digits than its factorization.

863706847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838768.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The square root of 863706847 is about 29388.8898565427. The cubic root of 863706847 is about 952.3328987686.

The spelling of 863706847 in words is "eight hundred sixty-three million, seven hundred six thousand, eight hundred forty-seven".