689646223 has 4 divisors (see below), whose sum is σ = 788167120. Its totient is φ = 591125328.

The previous prime is 689646179. The next prime is 689646239. The reversal of 689646223 is 322646986.

689646223 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, and also an emirpimes, since its reverse is a distinct semiprime: 322646986 = 2 ⋅161323493.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689646223 is a prime.

It is a super-2 number, since 2×689646223² = 951223825796331458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689643223) 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, 49260438 + ... + 49260451.

It is an arithmetic number, because the mean of its divisors is an integer number (197041780).

Almost surely, 2^689646223 is an apocalyptic number.

689646223 is a deficient number, since it is larger than the sum of its proper divisors (98520897).

689646223 is an equidigital number, since it uses as much as digits as its factorization.

689646223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98520896.

The product of its digits is 746496, while the sum is 46.

The square root of 689646223 is about 26261.1161796295. The cubic root of 689646223 is about 883.5045437051.

The spelling of 689646223 in words is "six hundred eighty-nine million, six hundred forty-six thousand, two hundred twenty-three".