611643223 has 4 divisors (see below), whose sum is σ = 625867528. Its totient is φ = 597418920.

The previous prime is 611643169. The next prime is 611643233. The reversal of 611643223 is 322346116.

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 611643223 - 2²¹ = 609546071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 611643191 and 611643200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611643233) 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, 7112088 + ... + 7112173.

It is an arithmetic number, because the mean of its divisors is an integer number (156466882).

Almost surely, 2^611643223 is an apocalyptic number.

611643223 is a deficient number, since it is larger than the sum of its proper divisors (14224305).

611643223 is a wasteful number, since it uses less digits than its factorization.

611643223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14224304.

The product of its digits is 5184, while the sum is 28.

The square root of 611643223 is about 24731.4217747383. The cubic root of 611643223 is about 848.8534590029.

Adding to 611643223 its reverse (322346116), we get a palindrome (933989339).

The spelling of 611643223 in words is "six hundred eleven million, six hundred forty-three thousand, two hundred twenty-three".