297997 has 4 divisors (see below), whose sum is σ = 340576. Its totient is φ = 255420.

The previous prime is 297991. The next prime is 298013. The reversal of 297997 is 799792.

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 cyclic number.

It is not a de Polignac number, because 297997 - 2³ = 297989 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 (297991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21279 + ... + 21292.

It is an arithmetic number, because the mean of its divisors is an integer number (85144).

2²⁹⁷⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

297997 is a deficient number, since it is larger than the sum of its proper divisors (42579).

297997 is an equidigital number, since it uses as much as digits as its factorization.

297997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42578.

The product of its digits is 71442, while the sum is 43.

The square root of 297997 is about 545.8910147639. The cubic root of 297997 is about 66.7939761740.

The spelling of 297997 in words is "two hundred ninety-seven thousand, nine hundred ninety-seven".