897984577 has 4 divisors (see below), whose sum is σ = 1026268096. Its totient is φ = 769701060.

The previous prime is 897984569. The next prime is 897984611. The reversal of 897984577 is 775489798.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 775489798 = 2 ⋅387744899.

It is a cyclic number.

It is not a de Polignac number, because 897984577 - 2³ = 897984569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (897984077) 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 in 3 ways as a sum of consecutive naturals, for example, 64141749 + ... + 64141762.

It is an arithmetic number, because the mean of its divisors is an integer number (256567024).

Almost surely, 2^897984577 is an apocalyptic number.

It is an amenable number.

897984577 is a deficient number, since it is larger than the sum of its proper divisors (128283519).

897984577 is a wasteful number, since it uses less digits than its factorization.

897984577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128283518.

The product of its digits is 35562240, while the sum is 64.

The square root of 897984577 is about 29966.3907903504. The cubic root of 897984577 is about 964.7681535605.

The spelling of 897984577 in words is "eight hundred ninety-seven million, nine hundred eighty-four thousand, five hundred seventy-seven".