897846909 has 4 divisors (see below), whose sum is σ = 1197129216. Its totient is φ = 598564604.

The previous prime is 897846889. The next prime is 897846979. The reversal of 897846909 is 909648798.

897846909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 897846909 - 2⁵ = 897846877 is a prime.

It is a super-2 number, since 2×897846909² = 1612258144001708562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897846979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149641149 + ... + 149641154.

It is an arithmetic number, because the mean of its divisors is an integer number (299282304).

Almost surely, 2^897846909 is an apocalyptic number.

It is an amenable number.

897846909 is a deficient number, since it is larger than the sum of its proper divisors (299282307).

897846909 is a wasteful number, since it uses less digits than its factorization.

897846909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299282306.

The product of its (nonzero) digits is 7838208, while the sum is 60.

The square root of 897846909 is about 29964.0936622485. The cubic root of 897846909 is about 964.7188488941.

The spelling of 897846909 in words is "eight hundred ninety-seven million, eight hundred forty-six thousand, nine hundred nine".