897935521 has 4 divisors (see below), whose sum is σ = 1026212032. Its totient is φ = 769659012.

The previous prime is 897935471. The next prime is 897935527. The reversal of 897935521 is 125539798.

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.

It is a cyclic number.

It is not a de Polignac number, because 897935521 - 2²⁷ = 763717793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897935527) 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 in 3 ways as a sum of consecutive naturals, for example, 64138245 + ... + 64138258.

It is an arithmetic number, because the mean of its divisors is an integer number (256553008).

Almost surely, 2^897935521 is an apocalyptic number.

It is an amenable number.

897935521 is a deficient number, since it is larger than the sum of its proper divisors (128276511).

897935521 is a wasteful number, since it uses less digits than its factorization.

897935521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128276510.

The product of its digits is 680400, while the sum is 49.

The square root of 897935521 is about 29965.5722621811. The cubic root of 897935521 is about 964.7505851339.

The spelling of 897935521 in words is "eight hundred ninety-seven million, nine hundred thirty-five thousand, five hundred twenty-one".