618623 has 4 divisors (see below), whose sum is σ = 627408. Its totient is φ = 609840.

The previous prime is 618619. The next prime is 618637. The reversal of 618623 is 326816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 618623 - 2² = 618619 is a prime.

It is a super-2 number, since 2×618623² = 765388832258, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 618592 and 618601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4286 + ... + 4427.

It is an arithmetic number, because the mean of its divisors is an integer number (156852).

2⁶¹⁸⁶²³ is an apocalyptic number.

618623 is a deficient number, since it is larger than the sum of its proper divisors (8785).

618623 is an equidigital number, since it uses as much as digits as its factorization.

618623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8784.

The product of its digits is 1728, while the sum is 26.

The square root of 618623 is about 786.5259054856. The cubic root of 618623 is about 85.2070155934.

The spelling of 618623 in words is "six hundred eighteen thousand, six hundred twenty-three".