289316997 has 18 divisors (see below), whose sum is σ = 420419922. Its totient is φ = 191722464.

The previous prime is 289316981. The next prime is 289317053. The reversal of 289316997 is 799613982.

It can be written as a sum of positive squares in 3 ways, for example, as 78747876 + 210569121 = 8874^2 + 14511^2 .

It is not a de Polignac number, because 289316997 - 2⁴ = 289316981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289316917) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 471663 + ... + 472275.

Almost surely, 2^289316997 is an apocalyptic number.

It is an amenable number.

289316997 is a deficient number, since it is larger than the sum of its proper divisors (131102925).

289316997 is an equidigital number, since it uses as much as digits as its factorization.

289316997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077 (or 845 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 289316997 is about 17009.3208859143. The cubic root of 289316997 is about 661.3905461786.

The spelling of 289316997 in words is "two hundred eighty-nine million, three hundred sixteen thousand, nine hundred ninety-seven".