289256317 has 4 divisors (see below), whose sum is σ = 330578656. Its totient is φ = 247933980.

The previous prime is 289256299. The next prime is 289256347. The reversal of 289256317 is 713652982.

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 de Polignac number, because none of the positive numbers 2^k-289256317 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 (289256347) 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, 20661159 + ... + 20661172.

It is an arithmetic number, because the mean of its divisors is an integer number (82644664).

Almost surely, 2^289256317 is an apocalyptic number.

It is an amenable number.

289256317 is a deficient number, since it is larger than the sum of its proper divisors (41322339).

289256317 is an equidigital number, since it uses as much as digits as its factorization.

289256317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41322338.

The product of its digits is 181440, while the sum is 43.

The square root of 289256317 is about 17007.5370644900. The cubic root of 289256317 is about 661.3443039543.

The spelling of 289256317 in words is "two hundred eighty-nine million, two hundred fifty-six thousand, three hundred seventeen".