897492864321 has 27 divisors (see below), whose sum is σ = 1301104429443. Its totient is φ = 596155330080.

The previous prime is 897492864319. The next prime is 897492864341. The reversal of 897492864321 is 123468294798.

The square root of 897492864321 is 947361.

It is a perfect power (a square), and thus also a powerful number.

897492864321 is a `hidden beast` number, since 8 + 9 + 7 + 492 + 86 + 43 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 776205050625 + 121287813696 = 881025^2 + 348264^2 .

It is not a de Polignac number, because 897492864321 - 2¹ = 897492864319 is a prime.

It is a super-2 number, since 2×897492864321² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (897492864341) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1298831586 + ... + 1298832276.

Almost surely, 2^897492864321 is an apocalyptic number.

897492864321 is the 947361-st square number.

897492864321 is the 473681-st centered octagonal number.

It is an amenable number.

897492864321 is a deficient number, since it is larger than the sum of its proper divisors (403611565122).

897492864321 is an frugal number, since it uses more digits than its factorization.

897492864321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302 (or 1151 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 63.

The spelling of 897492864321 in words is "eight hundred ninety-seven billion, four hundred ninety-two million, eight hundred sixty-four thousand, three hundred twenty-one".