289234981 has 4 divisors (see below), whose sum is σ = 330554272. Its totient is φ = 247915692.

The previous prime is 289234969. The next prime is 289235003. The reversal of 289234981 is 189432982.

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.

It is a cyclic number.

It is not a de Polignac number, because 289234981 - 2⁵ = 289234949 is a prime.

It is a super-2 number, since 2×289234981² = 167313748468140722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289235981) 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, 20659635 + ... + 20659648.

It is an arithmetic number, because the mean of its divisors is an integer number (82638568).

Almost surely, 2^289234981 is an apocalyptic number.

It is an amenable number.

289234981 is a deficient number, since it is larger than the sum of its proper divisors (41319291).

289234981 is an equidigital number, since it uses as much as digits as its factorization.

289234981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41319290.

The product of its digits is 248832, while the sum is 46.

The square root of 289234981 is about 17006.9098016071. The cubic root of 289234981 is about 661.3280429565.

It can be divided in two parts, 2892 and 34981, that added together give a palindrome (37873).

The spelling of 289234981 in words is "two hundred eighty-nine million, two hundred thirty-four thousand, nine hundred eighty-one".