689634111 has 8 divisors (see below), whose sum is σ = 919715760. Its totient is φ = 459654272.

The previous prime is 689634041. The next prime is 689634119. The reversal of 689634111 is 111436986.

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

It is a cyclic number.

It is not a de Polignac number, because 689634111 - 2⁷ = 689633983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 689634111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689634119) 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 7 ways as a sum of consecutive naturals, for example, 7920 + ... + 37973.

It is an arithmetic number, because the mean of its divisors is an integer number (114964470).

Almost surely, 2^689634111 is an apocalyptic number.

689634111 is a deficient number, since it is larger than the sum of its proper divisors (230081649).

689634111 is a wasteful number, since it uses less digits than its factorization.

689634111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50905.

The product of its digits is 31104, while the sum is 39.

The square root of 689634111 is about 26260.8855715111. The cubic root of 689634111 is about 883.4993714543.

The spelling of 689634111 in words is "six hundred eighty-nine million, six hundred thirty-four thousand, one hundred eleven".