897989668 has 6 divisors (see below), whose sum is σ = 1571481926. Its totient is φ = 448994832.

The previous prime is 897989663. The next prime is 897989671. The reversal of 897989668 is 866989798.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 772728804 + 125260864 = 27798^2 + 11192^2 .

It is a junction number, because it is equal to n+sod(n) for n = 897989597 and 897989606.

It is not an unprimeable number, because it can be changed into a prime (897989663) by changing a digit.

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, 112248705 + ... + 112248712.

Almost surely, 2^897989668 is an apocalyptic number.

It is an amenable number.

897989668 is a deficient number, since it is larger than the sum of its proper divisors (673492258).

897989668 is a wasteful number, since it uses less digits than its factorization.

897989668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224497421 (or 224497419 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 70.

The square root of 897989668 is about 29966.4757353947. The cubic root of 897989668 is about 964.7699767638.

The spelling of 897989668 in words is "eight hundred ninety-seven million, nine hundred eighty-nine thousand, six hundred sixty-eight".