863955313 has 8 divisors (see below), whose sum is σ = 939626856. Its totient is φ = 789600000.

The previous prime is 863955299. The next prime is 863955319. The reversal of 863955313 is 313559368.

It can be written as a sum of positive squares in 4 ways, for example, as 366799104 + 497156209 = 19152^2 + 22297^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 863955313 - 2²¹ = 861858161 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 863955313.

It is not an unprimeable number, because it can be changed into a prime (863955319) 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, 327688 + ... + 330313.

It is an arithmetic number, because the mean of its divisors is an integer number (117453357).

Almost surely, 2^863955313 is an apocalyptic number.

It is an amenable number.

863955313 is a deficient number, since it is larger than the sum of its proper divisors (75671543).

863955313 is a wasteful number, since it uses less digits than its factorization.

863955313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658115.

The product of its digits is 291600, while the sum is 43.

The square root of 863955313 is about 29393.1167622626. The cubic root of 863955313 is about 952.4242104833.

The spelling of 863955313 in words is "eight hundred sixty-three million, nine hundred fifty-five thousand, three hundred thirteen".