689772698 has 4 divisors (see below), whose sum is σ = 1034659050. Its totient is φ = 344886348.

The previous prime is 689772697. The next prime is 689772701. The reversal of 689772698 is 896277986.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 896277986 = 2 ⋅448138993.

It can be written as a sum of positive squares in only one way, i.e., 531440809 + 158331889 = 23053^2 + 12583^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 689772698.

It is not an unprimeable number, because it can be changed into a prime (689772697) 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, 172443173 + ... + 172443176.

Almost surely, 2^689772698 is an apocalyptic number.

689772698 is a deficient number, since it is larger than the sum of its proper divisors (344886352).

689772698 is a wasteful number, since it uses less digits than its factorization.

689772698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344886351.

The product of its digits is 18289152, while the sum is 62.

The square root of 689772698 is about 26263.5240971199. The cubic root of 689772698 is about 883.5585493693.

The spelling of 689772698 in words is "six hundred eighty-nine million, seven hundred seventy-two thousand, six hundred ninety-eight".