897543871 has 4 divisors (see below), whose sum is σ = 1025764432. Its totient is φ = 769323312.

The previous prime is 897543827. The next prime is 897543877. The reversal of 897543871 is 178345798.

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

It is a cyclic number.

It is not a de Polignac number, because 897543871 - 2¹³ = 897535679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897543877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64110270 + ... + 64110283.

It is an arithmetic number, because the mean of its divisors is an integer number (256441108).

Almost surely, 2^897543871 is an apocalyptic number.

897543871 is a deficient number, since it is larger than the sum of its proper divisors (128220561).

897543871 is a wasteful number, since it uses less digits than its factorization.

897543871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128220560.

The product of its digits is 1693440, while the sum is 52.

The square root of 897543871 is about 29959.0365499293. The cubic root of 897543871 is about 964.6103005568.

The spelling of 897543871 in words is "eight hundred ninety-seven million, five hundred forty-three thousand, eight hundred seventy-one".