289939666 has 8 divisors (see below), whose sum is σ = 435691980. Its totient is φ = 144709008.

The previous prime is 289939597. The next prime is 289939681. The reversal of 289939666 is 666939982.

It can be written as a sum of positive squares in 2 ways, for example, as 285441025 + 4498641 = 16895^2 + 2121^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 289939666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129021 + ... + 131248.

Almost surely, 2^289939666 is an apocalyptic number.

289939666 is a deficient number, since it is larger than the sum of its proper divisors (145752314).

289939666 is a wasteful number, since it uses less digits than its factorization.

289939666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260828.

The product of its digits is 7558272, while the sum is 58.

The square root of 289939666 is about 17027.6148065429. The cubic root of 289939666 is about 661.8646884996.

The spelling of 289939666 in words is "two hundred eighty-nine million, nine hundred thirty-nine thousand, six hundred sixty-six".