289722997 has 4 divisors (see below), whose sum is σ = 290414880. Its totient is φ = 289031116.

The previous prime is 289722991. The next prime is 289723003. The reversal of 289722997 is 799227982.

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 an interprime number because it is at equal distance from previous prime (289722991) and next prime (289723003).

It is a cyclic number.

It is not a de Polignac number, because 289722997 - 2¹⁵ = 289690229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289722991) 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, 345313 + ... + 346150.

It is an arithmetic number, because the mean of its divisors is an integer number (72603720).

Almost surely, 2^289722997 is an apocalyptic number.

It is an amenable number.

289722997 is a deficient number, since it is larger than the sum of its proper divisors (691883).

289722997 is an equidigital number, since it uses as much as digits as its factorization.

289722997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691882.

The product of its digits is 2286144, while the sum is 55.

The square root of 289722997 is about 17021.2513347286. The cubic root of 289722997 is about 661.6997791366.

The spelling of 289722997 in words is "two hundred eighty-nine million, seven hundred twenty-two thousand, nine hundred ninety-seven".