289854661 has 4 divisors (see below), whose sum is σ = 292067424. Its totient is φ = 287641900.

The previous prime is 289854647. The next prime is 289854673. The reversal of 289854661 is 166458982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166458982 = 2 ⋅83229491.

It is a cyclic number.

It is not a de Polignac number, because 289854661 - 2¹¹ = 289852613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289854601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1106185 + ... + 1106446.

It is an arithmetic number, because the mean of its divisors is an integer number (73016856).

Almost surely, 2^289854661 is an apocalyptic number.

It is an amenable number.

289854661 is a deficient number, since it is larger than the sum of its proper divisors (2212763).

289854661 is a wasteful number, since it uses less digits than its factorization.

289854661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212762.

The product of its digits is 829440, while the sum is 49.

The square root of 289854661 is about 17025.1185311586. The cubic root of 289854661 is about 661.7999999756.

The spelling of 289854661 in words is "two hundred eighty-nine million, eight hundred fifty-four thousand, six hundred sixty-one".