897986 has 4 divisors (see below), whose sum is σ = 1346982. Its totient is φ = 448992.

The previous prime is 897983. The next prime is 898013. The reversal of 897986 is 689798.

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

It can be written as a sum of positive squares in only one way, i.e., 819025 + 78961 = 905^2 + 281^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 897986.

It is not an unprimeable number, because it can be changed into a prime (897983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224495 + ... + 224498.

2⁸⁹⁷⁹⁸⁶ is an apocalyptic number.

897986 is a deficient number, since it is larger than the sum of its proper divisors (448996).

897986 is a wasteful number, since it uses less digits than its factorization.

897986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448995.

The product of its digits is 217728, while the sum is 47.

The square root of 897986 is about 947.6212323497. The cubic root of 897986 is about 96.4768663170.

The spelling of 897986 in words is "eight hundred ninety-seven thousand, nine hundred eighty-six".