689164898 has 4 divisors (see below), whose sum is σ = 1033747350. Its totient is φ = 344582448.

The previous prime is 689164891. The next prime is 689164907. The reversal of 689164898 is 898461986.

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

It can be written as a sum of positive squares in only one way, i.e., 376476409 + 312688489 = 19403^2 + 17683^2 .

It is not an unprimeable number, because it can be changed into a prime (689164891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172291223 + ... + 172291226.

Almost surely, 2^689164898 is an apocalyptic number.

689164898 is a deficient number, since it is larger than the sum of its proper divisors (344582452).

689164898 is a wasteful number, since it uses less digits than its factorization.

689164898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344582451.

The product of its digits is 5971968, while the sum is 59.

The square root of 689164898 is about 26251.9503656395. The cubic root of 689164898 is about 883.2989543362.

The spelling of 689164898 in words is "six hundred eighty-nine million, one hundred sixty-four thousand, eight hundred ninety-eight".