863922397 has 8 divisors (see below), whose sum is σ = 932420216. Its totient is φ = 795716352.

The previous prime is 863922379. The next prime is 863922401. The reversal of 863922397 is 793229368.

It can be written as a sum of positive squares in 4 ways, for example, as 403648281 + 460274116 = 20091^2 + 21454^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-863922397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 863922397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863922347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66768 + ... + 78649.

It is an arithmetic number, because the mean of its divisors is an integer number (116552527).

Almost surely, 2^863922397 is an apocalyptic number.

It is an amenable number.

863922397 is a deficient number, since it is larger than the sum of its proper divisors (68497819).

863922397 is a wasteful number, since it uses less digits than its factorization.

863922397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145887.

The product of its digits is 979776, while the sum is 49.

The square root of 863922397 is about 29392.5568299187. The cubic root of 863922397 is about 952.4121147985.

The spelling of 863922397 in words is "eight hundred sixty-three million, nine hundred twenty-two thousand, three hundred ninety-seven".