611623 has 4 divisors (see below), whose sum is σ = 613408. Its totient is φ = 609840.

The previous prime is 611621. The next prime is 611641. The reversal of 611623 is 326116.

611623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 611623 - 2¹ = 611621 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 611623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611621) 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, 198 + ... + 1123.

It is an arithmetic number, because the mean of its divisors is an integer number (153352).

2⁶¹¹⁶²³ is an apocalyptic number.

611623 is a deficient number, since it is larger than the sum of its proper divisors (1785).

611623 is a wasteful number, since it uses less digits than its factorization.

611623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784.

The product of its digits is 216, while the sum is 19.

The square root of 611623 is about 782.0632966711. The cubic root of 611623 is about 84.8844103575.

Adding to 611623 its reverse (326116), we get a palindrome (937739).

The spelling of 611623 in words is "six hundred eleven thousand, six hundred twenty-three".