689282945 has 8 divisors (see below), whose sum is σ = 890765736. Its totient is φ = 509008896.

The previous prime is 689282921. The next prime is 689282977. The reversal of 689282945 is 549282986.

It can be written as a sum of positive squares in 4 ways, for example, as 43665664 + 645617281 = 6608^2 + 25409^2 .

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 689282945 - 2²⁰ = 688234369 is a prime.

It is a super-2 number, since 2×689282945² = 950221956535746050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5302112 + ... + 5302241.

It is an arithmetic number, because the mean of its divisors is an integer number (111345717).

Almost surely, 2^689282945 is an apocalyptic number.

689282945 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

689282945 is a deficient number, since it is larger than the sum of its proper divisors (201482791).

689282945 is a wasteful number, since it uses less digits than its factorization.

689282945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10604371.

The product of its digits is 2488320, while the sum is 53.

The square root of 689282945 is about 26254.1986166023. The cubic root of 689282945 is about 883.3493848592.

The spelling of 689282945 in words is "six hundred eighty-nine million, two hundred eighty-two thousand, nine hundred forty-five".