618813 has 32 divisors (see below), whose sum is σ = 1034880. Its totient is φ = 362880.

The previous prime is 618799. The next prime is 618823. The reversal of 618813 is 318816.

It is not a de Polignac number, because 618813 - 2⁹ = 618301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618823) 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 31 ways as a sum of consecutive naturals, for example, 14370 + ... + 14412.

It is an arithmetic number, because the mean of its divisors is an integer number (32340).

2⁶¹⁸⁸¹³ is an apocalyptic number.

It is an amenable number.

618813 is a deficient number, since it is larger than the sum of its proper divisors (416067).

618813 is a wasteful number, since it uses less digits than its factorization.

618813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 100 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 618813 is about 786.6466805371. The cubic root of 618813 is about 85.2157380171.

It can be divided in two parts, 618 and 813, that added together give a triangular number (1431 = T₅₃).

The spelling of 618813 in words is "six hundred eighteen thousand, eight hundred thirteen".