897781369 has 15 divisors (see below), whose sum is σ = 959212853. Its totient is φ = 840282372.

The previous prime is 897781361. The next prime is 897781393. The reversal of 897781369 is 963187798.

The square root of 897781369 is 29963.

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

897781369 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 897781369 - 2³ = 897781361 is a prime.

It is a super-2 number, since 2×897781369² = 1612022773047028322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (897781361) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 10816602 + ... + 10816684.

Almost surely, 2^897781369 is an apocalyptic number.

897781369 is the 29963-rd square number.

897781369 is the 14982-nd centered octagonal number.

It is an amenable number.

897781369 is a deficient number, since it is larger than the sum of its proper divisors (61431484).

897781369 is an frugal number, since it uses more digits than its factorization.

897781369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 102 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 58.

The cubic root of 897781369 is about 964.6953745092.

The spelling of 897781369 in words is "eight hundred ninety-seven million, seven hundred eighty-one thousand, three hundred sixty-nine".