689705299 has 4 divisors (see below), whose sum is σ = 692059536. Its totient is φ = 687351064.

The previous prime is 689705297. The next prime is 689705309. The reversal of 689705299 is 992507986.

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 689705299 - 2¹ = 689705297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689705293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176679 + ... + 1177264.

It is an arithmetic number, because the mean of its divisors is an integer number (173014884).

Almost surely, 2^689705299 is an apocalyptic number.

689705299 is a deficient number, since it is larger than the sum of its proper divisors (2354237).

689705299 is a wasteful number, since it uses less digits than its factorization.

689705299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354236.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The square root of 689705299 is about 26262.2409363710. The cubic root of 689705299 is about 883.5297703708.

The spelling of 689705299 in words is "six hundred eighty-nine million, seven hundred five thousand, two hundred ninety-nine".