689389423 has 8 divisors (see below), whose sum is σ = 730969920. Its totient is φ = 647923200.

The previous prime is 689389399. The next prime is 689389447. The reversal of 689389423 is 324983986.

It is an interprime number because it is at equal distance from previous prime (689389399) and next prime (689389447).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 689389423 - 2¹⁷ = 689258351 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 (689389223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15978 + ... + 40423.

It is an arithmetic number, because the mean of its divisors is an integer number (91371240).

Almost surely, 2^689389423 is an apocalyptic number.

689389423 is a deficient number, since it is larger than the sum of its proper divisors (41580497).

689389423 is a wasteful number, since it uses less digits than its factorization.

689389423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57137.

The product of its digits is 2239488, while the sum is 52.

The square root of 689389423 is about 26256.2263663307. The cubic root of 689389423 is about 883.3948680838.

The spelling of 689389423 in words is "six hundred eighty-nine million, three hundred eighty-nine thousand, four hundred twenty-three".