897984578 has 4 divisors (see below), whose sum is σ = 1346976870. Its totient is φ = 448992288.

The previous prime is 897984569. The next prime is 897984611. The reversal of 897984578 is 875489798.

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., 870663049 + 27321529 = 29507^2 + 5227^2 .

It is an unprimeable number.

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, 224496143 + ... + 224496146.

Almost surely, 2^897984578 is an apocalyptic number.

897984578 is a deficient number, since it is larger than the sum of its proper divisors (448992292).

897984578 is a wasteful number, since it uses less digits than its factorization.

897984578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448992291.

The product of its digits is 40642560, while the sum is 65.

The square root of 897984578 is about 29966.3908070358. The cubic root of 897984578 is about 964.7681539186.

The spelling of 897984578 in words is "eight hundred ninety-seven million, nine hundred eighty-four thousand, five hundred seventy-eight".