289311313 has 4 divisors (see below), whose sum is σ = 298643968. Its totient is φ = 279978660.

The previous prime is 289311311. The next prime is 289311331. The reversal of 289311313 is 313113982.

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 289311313 - 2¹ = 289311311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 9332623 = 289311313 / (2 + 8 + 9 + 3 + 1 + 1 + 3 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289311311) 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, 4666281 + ... + 4666342.

It is an arithmetic number, because the mean of its divisors is an integer number (74660992).

Almost surely, 2^289311313 is an apocalyptic number.

It is an amenable number.

289311313 is a deficient number, since it is larger than the sum of its proper divisors (9332655).

289311313 is an equidigital number, since it uses as much as digits as its factorization.

289311313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9332654.

The product of its digits is 3888, while the sum is 31.

The square root of 289311313 is about 17009.1538002336. The cubic root of 289311313 is about 661.3862148644.

The spelling of 289311313 in words is "two hundred eighty-nine million, three hundred eleven thousand, three hundred thirteen".