863319947 has 4 divisors (see below), whose sum is σ = 986651376. Its totient is φ = 739988520.

The previous prime is 863319913. The next prime is 863319983. The reversal of 863319947 is 749913368.

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 863319947 - 2¹⁰ = 863318923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 863319895 and 863319904.

It is not an unprimeable number, because it can be changed into a prime (863319907) 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, 61665704 + ... + 61665717.

It is an arithmetic number, because the mean of its divisors is an integer number (246662844).

Almost surely, 2^863319947 is an apocalyptic number.

863319947 is a deficient number, since it is larger than the sum of its proper divisors (123331429).

863319947 is a wasteful number, since it uses less digits than its factorization.

863319947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123331428.

The product of its digits is 979776, while the sum is 50.

The square root of 863319947 is about 29382.3066997811. The cubic root of 863319947 is about 952.1906774309.

The spelling of 863319947 in words is "eight hundred sixty-three million, three hundred nineteen thousand, nine hundred forty-seven".