289631 has 4 divisors (see below), whose sum is σ = 294600. Its totient is φ = 284664.

The previous prime is 289607. The next prime is 289637. The reversal of 289631 is 136982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136982 = 2 ⋅68491.

It is a cyclic number.

It is not a de Polignac number, because 289631 - 2¹⁸ = 27487 is a prime.

It is a super-2 number, since 2×289631² = 167772232322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 289594 and 289603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2396 + ... + 2513.

It is an arithmetic number, because the mean of its divisors is an integer number (73650).

2²⁸⁹⁶³¹ is an apocalyptic number.

289631 is a deficient number, since it is larger than the sum of its proper divisors (4969).

289631 is an equidigital number, since it uses as much as digits as its factorization.

289631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4968.

The product of its digits is 2592, while the sum is 29.

The square root of 289631 is about 538.1737637604. The cubic root of 289631 is about 66.1629734255.

The spelling of 289631 in words is "two hundred eighty-nine thousand, six hundred thirty-one".