897171893 has 4 divisors (see below), whose sum is σ = 921419820. Its totient is φ = 872923968.

The previous prime is 897171883. The next prime is 897171907. The reversal of 897171893 is 398171798.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 756085009 + 141086884 = 27497^2 + 11878^2 .

It is a cyclic number.

It is not a de Polignac number, because 897171893 - 2²⁴ = 880394677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897171853) 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, 12123908 + ... + 12123981.

It is an arithmetic number, because the mean of its divisors is an integer number (230354955).

Almost surely, 2^897171893 is an apocalyptic number.

It is an amenable number.

897171893 is a deficient number, since it is larger than the sum of its proper divisors (24247927).

897171893 is a wasteful number, since it uses less digits than its factorization.

897171893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24247926.

The product of its digits is 762048, while the sum is 53.

The square root of 897171893 is about 29952.8277963868. The cubic root of 897171893 is about 964.4770244752.

The spelling of 897171893 in words is "eight hundred ninety-seven million, one hundred seventy-one thousand, eight hundred ninety-three".