897730969 has 2 divisors, whose sum is σ = 897730970. Its totient is φ = 897730968.

The previous prime is 897730927. The next prime is 897730979. The reversal of 897730969 is 969037798.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 774787225 + 122943744 = 27835^2 + 11088^2 .

It is a cyclic number.

It is not a de Polignac number, because 897730969 - 2²³ = 889342361 is a prime.

It is a super-2 number, since 2×897730969² = 1611841785403357922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (897730979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448865484 + 448865485.

It is an arithmetic number, because the mean of its divisors is an integer number (448865485).

Almost surely, 2^897730969 is an apocalyptic number.

It is an amenable number.

897730969 is a deficient number, since it is larger than the sum of its proper divisors (1).

897730969 is an equidigital number, since it uses as much as digits as its factorization.

897730969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5143824, while the sum is 58.

The square root of 897730969 is about 29962.1589509167. The cubic root of 897730969 is about 964.6773220232.

The spelling of 897730969 in words is "eight hundred ninety-seven million, seven hundred thirty thousand, nine hundred sixty-nine".