897736521 has 16 divisors (see below), whose sum is σ = 1307105280. Its totient is φ = 543538320.

The previous prime is 897736501. The next prime is 897736537. The reversal of 897736521 is 125637798.

897736521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 897736521 - 2⁷ = 897736393 is a prime.

It is a super-2 number, since 2×897736521² = 1611861722274366882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (897736501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21196 + ... + 47378.

It is an arithmetic number, because the mean of its divisors is an integer number (81694080).

Almost surely, 2^897736521 is an apocalyptic number.

It is an amenable number.

897736521 is a deficient number, since it is larger than the sum of its proper divisors (409368759).

897736521 is a wasteful number, since it uses less digits than its factorization.

897736521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27236.

The product of its digits is 635040, while the sum is 48.

The square root of 897736521 is about 29962.2516009728. The cubic root of 897736521 is about 964.6793106952.

The spelling of 897736521 in words is "eight hundred ninety-seven million, seven hundred thirty-six thousand, five hundred twenty-one".