289013321 has 4 divisors (see below), whose sum is σ = 289050132. Its totient is φ = 288976512.

The previous prime is 289013317. The next prime is 289013359. The reversal of 289013321 is 123310982.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 34164025 + 254849296 = 5845^2 + 15964^2 .

It is a cyclic number.

It is not a de Polignac number, because 289013321 - 2² = 289013317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289013371) 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, 1376 + ... + 24081.

It is an arithmetic number, because the mean of its divisors is an integer number (72262533).

Almost surely, 2^289013321 is an apocalyptic number.

It is an amenable number.

289013321 is a deficient number, since it is larger than the sum of its proper divisors (36811).

289013321 is a wasteful number, since it uses less digits than its factorization.

289013321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36810.

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

The square root of 289013321 is about 17000.3917896030. The cubic root of 289013321 is about 661.1590598956.

The spelling of 289013321 in words is "two hundred eighty-nine million, thirteen thousand, three hundred twenty-one".