897644173 has 2 divisors, whose sum is σ = 897644174. Its totient is φ = 897644172.

The previous prime is 897644159. The next prime is 897644179. The reversal of 897644173 is 371446798.

897644173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 897481764 + 162409 = 29958^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 897644173 - 2²⁹ = 360773261 is a prime.

It is a super-2 number, since 2×897644173² = 1611530122641707858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (897644179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448822086 + 448822087.

It is an arithmetic number, because the mean of its divisors is an integer number (448822087).

Almost surely, 2^897644173 is an apocalyptic number.

It is an amenable number.

897644173 is a deficient number, since it is larger than the sum of its proper divisors (1).

897644173 is an equidigital number, since it uses as much as digits as its factorization.

897644173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 49.

The square root of 897644173 is about 29960.7104889053. The cubic root of 897644173 is about 964.6462314796.

The spelling of 897644173 in words is "eight hundred ninety-seven million, six hundred forty-four thousand, one hundred seventy-three".