689141986 has 16 divisors (see below), whose sum is σ = 1120707000. Its totient is φ = 315929088.

The previous prime is 689141977. The next prime is 689142011.

689141986 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 291897225 + 397244761 = 17085^2 + 19931^2 .

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, 85071 + ... + 92818.

Almost surely, 2^689141986 is an apocalyptic number.

689141986 is a deficient number, since it is larger than the sum of its proper divisors (431565014).

689141986 is a wasteful number, since it uses less digits than its factorization.

689141986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178053.

The product of its digits is 746496, while the sum is 52.

The square root of 689141986 is about 26251.5139753882. The cubic root of 689141986 is about 883.2891654986.

The spelling of 689141986 in words is "six hundred eighty-nine million, one hundred forty-one thousand, nine hundred eighty-six".