398297 has 4 divisors (see below), whose sum is σ = 419280. Its totient is φ = 377316.

The previous prime is 398287. The next prime is 398303. The reversal of 398297 is 792893.

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 398297 - 2¹² = 394201 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 398297.

It is not an unprimeable number, because it can be changed into a prime (398207) 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, 10463 + ... + 10500.

It is an arithmetic number, because the mean of its divisors is an integer number (104820).

2³⁹⁸²⁹⁷ is an apocalyptic number.

It is an amenable number.

398297 is a deficient number, since it is larger than the sum of its proper divisors (20983).

398297 is a wasteful number, since it uses less digits than its factorization.

398297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20982.

The product of its digits is 27216, while the sum is 38.

The square root of 398297 is about 631.1077562509. The cubic root of 398297 is about 73.5759161315.

The spelling of 398297 in words is "three hundred ninety-eight thousand, two hundred ninety-seven".