689895799 has 4 divisors (see below), whose sum is σ = 693707560. Its totient is φ = 686084040.

The previous prime is 689895797. The next prime is 689895809. The reversal of 689895799 is 997598986.

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

It is a cyclic number.

It is not a de Polignac number, because 689895799 - 2¹ = 689895797 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 (689895797) 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 3 ways as a sum of consecutive naturals, for example, 1905609 + ... + 1905970.

It is an arithmetic number, because the mean of its divisors is an integer number (173426890).

Almost surely, 2^689895799 is an apocalyptic number.

689895799 is a deficient number, since it is larger than the sum of its proper divisors (3811761).

689895799 is a wasteful number, since it uses less digits than its factorization.

689895799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3811760.

The product of its digits is 88179840, while the sum is 70.

The square root of 689895799 is about 26265.8675661018. The cubic root of 689895799 is about 883.6111079738.

The spelling of 689895799 in words is "six hundred eighty-nine million, eight hundred ninety-five thousand, seven hundred ninety-nine".