689900819 has 8 divisors (see below), whose sum is σ = 693672672. Its totient is φ = 686136960.

The previous prime is 689900777. The next prime is 689900833. The reversal of 689900819 is 918009986.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689900819 is a prime.

It is a super-2 number, since 2×689900819² = 951926280113741522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689900899) 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, 254837 + ... + 257529.

It is an arithmetic number, because the mean of its divisors is an integer number (86709084).

Almost surely, 2^689900819 is an apocalyptic number.

689900819 is a deficient number, since it is larger than the sum of its proper divisors (3771853).

689900819 is a wasteful number, since it uses less digits than its factorization.

689900819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 689900819 is about 26265.9631272109. The cubic root of 689900819 is about 883.6132511559.

The spelling of 689900819 in words is "six hundred eighty-nine million, nine hundred thousand, eight hundred nineteen".