897269521 has 4 divisors (see below), whose sum is σ = 900154944. Its totient is φ = 894384100.

The previous prime is 897269501. The next prime is 897269531. The reversal of 897269521 is 125962798.

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 897269521 - 2⁷ = 897269393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897269501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1442245 + ... + 1442866.

It is an arithmetic number, because the mean of its divisors is an integer number (225038736).

Almost surely, 2^897269521 is an apocalyptic number.

It is an amenable number.

897269521 is a deficient number, since it is larger than the sum of its proper divisors (2885423).

897269521 is a wasteful number, since it uses less digits than its factorization.

897269521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885422.

The product of its digits is 544320, while the sum is 49.

The square root of 897269521 is about 29954.4574479325. The cubic root of 897269521 is about 964.5120071983.

The spelling of 897269521 in words is "eight hundred ninety-seven million, two hundred sixty-nine thousand, five hundred twenty-one".