297989 has 2 divisors, whose sum is σ = 297990. Its totient is φ = 297988.

The previous prime is 297971. The next prime is 297991. The reversal of 297989 is 989792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 293764 + 4225 = 542^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 297989 - 2¹² = 293893 is a prime.

Together with 297991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (297289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148994 + 148995.

It is an arithmetic number, because the mean of its divisors is an integer number (148995).

2²⁹⁷⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

297989 is a deficient number, since it is larger than the sum of its proper divisors (1).

297989 is an equidigital number, since it uses as much as digits as its factorization.

297989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 44.

The square root of 297989 is about 545.8836872448. The cubic root of 297989 is about 66.7933784537.

The spelling of 297989 in words is "two hundred ninety-seven thousand, nine hundred eighty-nine".