289651 has 4 divisors (see below), whose sum is σ = 291592. Its totient is φ = 287712.

The previous prime is 289643. The next prime is 289657. The reversal of 289651 is 156982.

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

It is a cyclic number.

It is not a de Polignac number, because 289651 - 2³ = 289643 is a prime.

It is a d-powerful number, because it can be written as 2¹⁸ + 8⁴ + 6⁵ + 9 + 5⁶ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726 + ... + 1051.

It is an arithmetic number, because the mean of its divisors is an integer number (72898).

2²⁸⁹⁶⁵¹ is an apocalyptic number.

289651 is a deficient number, since it is larger than the sum of its proper divisors (1941).

289651 is a wasteful number, since it uses less digits than its factorization.

289651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940.

The product of its digits is 4320, while the sum is 31.

The square root of 289651 is about 538.1923447988. The cubic root of 289651 is about 66.1644963161.

It can be divided in two parts, 2896 and 51, that multiplied together give a triangular number (147696 = T₅₄₃).

The spelling of 289651 in words is "two hundred eighty-nine thousand, six hundred fifty-one".