689698977 has 8 divisors (see below), whose sum is σ = 1003198560. Its totient is φ = 417999360.

The previous prime is 689698951. The next prime is 689698987. The reversal of 689698977 is 779896986.

689698977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 689698977 - 2¹² = 689694881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689698937) 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, 10449952 + ... + 10450017.

It is an arithmetic number, because the mean of its divisors is an integer number (125399820).

Almost surely, 2^689698977 is an apocalyptic number.

It is an amenable number.

689698977 is a deficient number, since it is larger than the sum of its proper divisors (313499583).

689698977 is a wasteful number, since it uses less digits than its factorization.

689698977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20899983.

The product of its digits is 82301184, while the sum is 69.

The square root of 689698977 is about 26262.1205731754. The cubic root of 689698977 is about 883.5270708157.

The spelling of 689698977 in words is "six hundred eighty-nine million, six hundred ninety-eight thousand, nine hundred seventy-seven".