897225811 has 2 divisors, whose sum is σ = 897225812. Its totient is φ = 897225810.

The previous prime is 897225799. The next prime is 897225827. The reversal of 897225811 is 118522798.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 897225811 - 2¹¹ = 897223763 is a prime.

It is not a weakly prime, because it can be changed into another prime (897225211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448612905 + 448612906.

It is an arithmetic number, because the mean of its divisors is an integer number (448612906).

Almost surely, 2^897225811 is an apocalyptic number.

897225811 is a deficient number, since it is larger than the sum of its proper divisors (1).

897225811 is an equidigital number, since it uses as much as digits as its factorization.

897225811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 43.

The square root of 897225811 is about 29953.7278314403. The cubic root of 897225811 is about 964.4963450502.

The spelling of 897225811 in words is "eight hundred ninety-seven million, two hundred twenty-five thousand, eight hundred eleven".