897405709225 has 9 divisors (see below), whose sum is σ = 1112788952823. Its totient is φ = 717920778120.

The previous prime is 897405709223. The next prime is 897405709231. The reversal of 897405709225 is 522907504798.

The square root of 897405709225 is 947315.

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

897405709225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 323066055321 + 574339653904 = 568389^2 + 757852^2 .

It is not a de Polignac number, because 897405709225 - 2¹ = 897405709223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 897405709225.

It is not an unprimeable number, because it can be changed into a prime (897405709223) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4641844 + ... + 4831306.

Almost surely, 2^897405709225 is an apocalyptic number.

897405709225 is the 947315-th square number.

897405709225 is the 473658-th centered octagonal number.

It is an amenable number.

897405709225 is a deficient number, since it is larger than the sum of its proper divisors (215383243598).

897405709225 is an frugal number, since it uses more digits than its factorization.

897405709225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378936 (or 189468 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 897405709225 in words is "eight hundred ninety-seven billion, four hundred five million, seven hundred nine thousand, two hundred twenty-five".