897819071 has 4 divisors (see below), whose sum is σ = 902835000. Its totient is φ = 892803144.

The previous prime is 897819067. The next prime is 897819119. The reversal of 897819071 is 170918798.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170918798 = 2 ⋅85459399.

It is a cyclic number.

It is not a de Polignac number, because 897819071 - 2² = 897819067 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 (897819061) 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, 2507696 + ... + 2508053.

It is an arithmetic number, because the mean of its divisors is an integer number (225708750).

Almost surely, 2^897819071 is an apocalyptic number.

897819071 is a deficient number, since it is larger than the sum of its proper divisors (5015929).

897819071 is a wasteful number, since it uses less digits than its factorization.

897819071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5015928.

The product of its (nonzero) digits is 254016, while the sum is 50.

The square root of 897819071 is about 29963.6291360042. The cubic root of 897819071 is about 964.7088783298.

The spelling of 897819071 in words is "eight hundred ninety-seven million, eight hundred nineteen thousand, seventy-one".