689946859 has 8 divisors (see below), whose sum is σ = 815700960. Its totient is φ = 570990336.

The previous prime is 689946821. The next prime is 689946863. The reversal of 689946859 is 958649986.

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

It is not a de Polignac number, because 689946859 - 2¹¹ = 689944811 is a prime.

It is a super-3 number, since 3×689946859³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 689946859.

It is not an unprimeable number, because it can be changed into a prime (689946809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1699174 + ... + 1699579.

It is an arithmetic number, because the mean of its divisors is an integer number (101962620).

Almost surely, 2^689946859 is an apocalyptic number.

689946859 is a deficient number, since it is larger than the sum of its proper divisors (125754101).

689946859 is a wasteful number, since it uses less digits than its factorization.

689946859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398789.

The product of its digits is 33592320, while the sum is 64.

The square root of 689946859 is about 26266.8395320031. The cubic root of 689946859 is about 883.6329064687.

The spelling of 689946859 in words is "six hundred eighty-nine million, nine hundred forty-six thousand, eight hundred fifty-nine".