897870881 has 2 divisors, whose sum is σ = 897870882. Its totient is φ = 897870880.

The previous prime is 897870829. The next prime is 897870907. The reversal of 897870881 is 188078798.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 691690000 + 206180881 = 26300^2 + 14359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897870881 is a prime.

It is a super-2 number, since 2×897870881² = 1612344237895432322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (897879881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448935440 + 448935441.

It is an arithmetic number, because the mean of its divisors is an integer number (448935441).

Almost surely, 2^897870881 is an apocalyptic number.

It is an amenable number.

897870881 is a deficient number, since it is larger than the sum of its proper divisors (1).

897870881 is an equidigital number, since it uses as much as digits as its factorization.

897870881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1806336, while the sum is 56.

The square root of 897870881 is about 29964.4936716775. The cubic root of 897870881 is about 964.7274346319.

The spelling of 897870881 in words is "eight hundred ninety-seven million, eight hundred seventy thousand, eight hundred eighty-one".