289808066 has 4 divisors (see below), whose sum is σ = 434712102. Its totient is φ = 144904032.

The previous prime is 289808047. The next prime is 289808093. The reversal of 289808066 is 660808982.

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., 277056025 + 12752041 = 16645^2 + 3571^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 289808066.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72452015 + ... + 72452018.

Almost surely, 2^289808066 is an apocalyptic number.

289808066 is a deficient number, since it is larger than the sum of its proper divisors (144904036).

289808066 is a wasteful number, since it uses less digits than its factorization.

289808066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144904035.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 289808066 is about 17023.7500569058. The cubic root of 289808066 is about 661.7645359683.

The spelling of 289808066 in words is "two hundred eighty-nine million, eight hundred eight thousand, sixty-six".