863913 has 16 divisors (see below), whose sum is σ = 1217216. Its totient is φ = 544320.

The previous prime is 863909. The next prime is 863917. The reversal of 863913 is 319368.

It is an interprime number because it is at equal distance from previous prime (863909) and next prime (863917).

It is not a de Polignac number, because 863913 - 2² = 863909 is a prime.

It is a super-3 number, since 3×863913³ = 1934333184486568491, which contains 333 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (863917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4683 + ... + 4863.

It is an arithmetic number, because the mean of its divisors is an integer number (76076).

2⁸⁶³⁹¹³ is an apocalyptic number.

It is an amenable number.

863913 is a deficient number, since it is larger than the sum of its proper divisors (353303).

863913 is a wasteful number, since it uses less digits than its factorization.

863913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264.

The product of its digits is 3888, while the sum is 30.

The square root of 863913 is about 929.4692033629. The cubic root of 863913 is about 95.2408661614.

The spelling of 863913 in words is "eight hundred sixty-three thousand, nine hundred thirteen".