897308857 has 4 divisors (see below), whose sum is σ = 926254336. Its totient is φ = 868363380.

The previous prime is 897308831. The next prime is 897308873. The reversal of 897308857 is 758803798.

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 897308857 - 2¹⁵ = 897276089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 897308798 and 897308807.

It is not an unprimeable number, because it can be changed into a prime (897308827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14472693 + ... + 14472754.

It is an arithmetic number, because the mean of its divisors is an integer number (231563584).

Almost surely, 2^897308857 is an apocalyptic number.

It is an amenable number.

897308857 is a deficient number, since it is larger than the sum of its proper divisors (28945479).

897308857 is a wasteful number, since it uses less digits than its factorization.

897308857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28945478.

The product of its (nonzero) digits is 3386880, while the sum is 55.

The square root of 897308857 is about 29955.1140375062. The cubic root of 897308857 is about 964.5261016218.

The spelling of 897308857 in words is "eight hundred ninety-seven million, three hundred eight thousand, eight hundred fifty-seven".