897631811 has 2 divisors, whose sum is σ = 897631812. Its totient is φ = 897631810.

The previous prime is 897631793. The next prime is 897631829. The reversal of 897631811 is 118136798.

It is a balanced prime because it is at equal distance from previous prime (897631793) and next prime (897631829).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897631811 is a prime.

It is not a weakly prime, because it can be changed into another prime (897631411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448815905 + 448815906.

It is an arithmetic number, because the mean of its divisors is an integer number (448815906).

Almost surely, 2^897631811 is an apocalyptic number.

897631811 is a deficient number, since it is larger than the sum of its proper divisors (1).

897631811 is an equidigital number, since it uses as much as digits as its factorization.

897631811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 44.

The square root of 897631811 is about 29960.5041846762. The cubic root of 897631811 is about 964.6418032173.

The spelling of 897631811 in words is "eight hundred ninety-seven million, six hundred thirty-one thousand, eight hundred eleven".