897998 has 4 divisors (see below), whose sum is σ = 1347000. Its totient is φ = 448998.

The previous prime is 897983. The next prime is 898013. The reversal of 897998 is 899798.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (897983) and next prime (898013).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

897998 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224498 + ... + 224501.

It is an arithmetic number, because the mean of its divisors is an integer number (336750).

2⁸⁹⁷⁹⁹⁸ is an apocalyptic number.

897998 is a deficient number, since it is larger than the sum of its proper divisors (449002).

897998 is a wasteful number, since it uses less digits than its factorization.

897998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449001.

The product of its digits is 326592, while the sum is 50.

The square root of 897998 is about 947.6275639723. The cubic root of 897998 is about 96.4772960628.

The spelling of 897998 in words is "eight hundred ninety-seven thousand, nine hundred ninety-eight".