863613 has 6 divisors (see below), whose sum is σ = 1247454. Its totient is φ = 575736.

The previous prime is 863609. The next prime is 863633. The reversal of 863613 is 316368.

It can be written as a sum of positive squares in only one way, i.e., 736164 + 127449 = 858^2 + 357^2 .

It is not a de Polignac number, because 863613 - 2² = 863609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47970 + ... + 47987.

It is an arithmetic number, because the mean of its divisors is an integer number (207909).

2⁸⁶³⁶¹³ is an apocalyptic number.

It is an amenable number.

863613 is a deficient number, since it is larger than the sum of its proper divisors (383841).

863613 is a wasteful number, since it uses less digits than its factorization.

863613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95963 (or 95960 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 863613 is about 929.3078069187. The cubic root of 863613 is about 95.2298405266.

It can be divided in two parts, 8636 and 13, that added together give a square (8649 = 93²).

The spelling of 863613 in words is "eight hundred sixty-three thousand, six hundred thirteen".