689091223 has 4 divisors (see below), whose sum is σ = 705898368. Its totient is φ = 672284080.

The previous prime is 689091217. The next prime is 689091229. The reversal of 689091223 is 322190986.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (689091217) and next prime (689091229).

It is a cyclic number.

It is not a de Polignac number, because 689091223 - 2⁵ = 689091191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689091229) 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, 8403511 + ... + 8403592.

It is an arithmetic number, because the mean of its divisors is an integer number (176474592).

Almost surely, 2^689091223 is an apocalyptic number.

689091223 is a deficient number, since it is larger than the sum of its proper divisors (16807145).

689091223 is a wasteful number, since it uses less digits than its factorization.

689091223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16807144.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 689091223 is about 26250.5470990606. The cubic root of 689091223 is about 883.2674769304.

The spelling of 689091223 in words is "six hundred eighty-nine million, ninety-one thousand, two hundred twenty-three".