897871905 has 64 divisors (see below), whose sum is σ = 1831841280. Its totient is φ = 408748032.

The previous prime is 897871901. The next prime is 897871937. The reversal of 897871905 is 509178798.

It is not a de Polignac number, because 897871905 - 2² = 897871901 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (897871901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 241017 + ... + 244713.

It is an arithmetic number, because the mean of its divisors is an integer number (28622520).

Almost surely, 2^897871905 is an apocalyptic number.

It is an amenable number.

897871905 is an abundant number, since it is smaller than the sum of its proper divisors (933969375).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

897871905 is a wasteful number, since it uses less digits than its factorization.

897871905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3975 (or 3969 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 54.

The square root of 897871905 is about 29964.5107585624. The cubic root of 897871905 is about 964.7278013812.

The spelling of 897871905 in words is "eight hundred ninety-seven million, eight hundred seventy-one thousand, nine hundred five".