897881 has 2 divisors, whose sum is σ = 897882. Its totient is φ = 897880.

The previous prime is 897877. The next prime is 897887. The reversal of 897881 is 188798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 737881 + 160000 = 859^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 897881 - 2² = 897877 is a prime.

It is a super-2 number, since 2×897881² = 1612380580322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 897881.

It is not a weakly prime, because it can be changed into another prime (897887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448940 + 448941.

It is an arithmetic number, because the mean of its divisors is an integer number (448941).

2⁸⁹⁷⁸⁸¹ is an apocalyptic number.

It is an amenable number.

897881 is a deficient number, since it is larger than the sum of its proper divisors (1).

897881 is an equidigital number, since it uses as much as digits as its factorization.

897881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 41.

The square root of 897881 is about 947.5658288478. The cubic root of 897881 is about 96.4731058776.

The spelling of 897881 in words is "eight hundred ninety-seven thousand, eight hundred eighty-one".