289681706 has 4 divisors (see below), whose sum is σ = 434522562. Its totient is φ = 144840852.

The previous prime is 289681697. The next prime is 289681781. The reversal of 289681706 is 607186982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 276058225 + 13623481 = 16615^2 + 3691^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72420425 + ... + 72420428.

Almost surely, 2^289681706 is an apocalyptic number.

289681706 is a deficient number, since it is larger than the sum of its proper divisors (144840856).

289681706 is a wasteful number, since it uses less digits than its factorization.

289681706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144840855.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 289681706 is about 17020.0383665843. The cubic root of 289681706 is about 661.6683427370.

The spelling of 289681706 in words is "two hundred eighty-nine million, six hundred eighty-one thousand, seven hundred six".