289220961 has 4 divisors (see below), whose sum is σ = 385627952. Its totient is φ = 192813972.

The previous prime is 289220959. The next prime is 289220969. The reversal of 289220961 is 169022982.

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 not a de Polignac number, because 289220961 - 2¹ = 289220959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289220969) 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, 48203491 + ... + 48203496.

It is an arithmetic number, because the mean of its divisors is an integer number (96406988).

Almost surely, 2^289220961 is an apocalyptic number.

It is an amenable number.

289220961 is a deficient number, since it is larger than the sum of its proper divisors (96406991).

289220961 is an equidigital number, since it uses as much as digits as its factorization.

289220961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96406990.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 289220961 is about 17006.4976112073. The cubic root of 289220961 is about 661.3173573322.

The spelling of 289220961 in words is "two hundred eighty-nine million, two hundred twenty thousand, nine hundred sixty-one".