897182209 has 27 divisors (see below), whose sum is σ = 1150121091. Its totient is φ = 697305840.

The previous prime is 897182207. The next prime is 897182239. The reversal of 897182209 is 902281798.

The square root of 897182209 is 29953.

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

897182209 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., 211789809 + 685392400 = 14553^2 + 26180^2 .

It is not a de Polignac number, because 897182209 - 2¹ = 897182207 is a prime.

It is a super-2 number, since 2×897182209² = 1609871832292239362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (897182207) 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, 2306187 + ... + 2306575.

Almost surely, 2^897182209 is an apocalyptic number.

897182209 is the 29953-rd square number.

897182209 is the 14977-th centered octagonal number.

It is an amenable number.

897182209 is a deficient number, since it is larger than the sum of its proper divisors (252938882).

897182209 is an equidigital number, since it uses as much as digits as its factorization.

897182209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The cubic root of 897182209 is about 964.4807210938.

The spelling of 897182209 in words is "eight hundred ninety-seven million, one hundred eighty-two thousand, two hundred nine".