897206217 has 4 divisors (see below), whose sum is σ = 1196274960. Its totient is φ = 598137476.

The previous prime is 897206159. The next prime is 897206227. The reversal of 897206217 is 712602798.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 897206217 - 2¹² = 897202121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (897206227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149534367 + ... + 149534372.

It is an arithmetic number, because the mean of its divisors is an integer number (299068740).

Almost surely, 2^897206217 is an apocalyptic number.

It is an amenable number.

897206217 is a deficient number, since it is larger than the sum of its proper divisors (299068743).

897206217 is a wasteful number, since it uses less digits than its factorization.

897206217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299068742.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 897206217 is about 29953.4007585115. The cubic root of 897206217 is about 964.4893239715.

The spelling of 897206217 in words is "eight hundred ninety-seven million, two hundred six thousand, two hundred seventeen".