689747986 has 16 divisors (see below), whose sum is σ = 1042076160. Its totient is φ = 342396720.

The previous prime is 689747857. The next prime is 689748041.

689747986 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235000 + ... + 237916.

It is an arithmetic number, because the mean of its divisors is an integer number (65129760).

Almost surely, 2^689747986 is an apocalyptic number.

689747986 is a deficient number, since it is larger than the sum of its proper divisors (352328174).

689747986 is a wasteful number, since it uses less digits than its factorization.

689747986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729.

The product of its digits is 36578304, while the sum is 64.

The square root of 689747986 is about 26263.0536305282. The cubic root of 689747986 is about 883.5479977003.

The spelling of 689747986 in words is "six hundred eighty-nine million, seven hundred forty-seven thousand, nine hundred eighty-six".