897984569 has 2 divisors, whose sum is σ = 897984570. Its totient is φ = 897984568.

The previous prime is 897984559. The next prime is 897984611. The reversal of 897984569 is 965489798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 876870544 + 21114025 = 29612^2 + 4595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897984569 is a prime.

It is a super-2 number, since 2×897984569² = 1612752572324231522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (897984539) 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, 448992284 + 448992285.

It is an arithmetic number, because the mean of its divisors is an integer number (448992285).

Almost surely, 2^897984569 is an apocalyptic number.

It is an amenable number.

897984569 is a deficient number, since it is larger than the sum of its proper divisors (1).

897984569 is an equidigital number, since it uses as much as digits as its factorization.

897984569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39191040, while the sum is 65.

The square root of 897984569 is about 29966.3906568676. The cubic root of 897984569 is about 964.7681506955.

The spelling of 897984569 in words is "eight hundred ninety-seven million, nine hundred eighty-four thousand, five hundred sixty-nine".