897319331 has 2 divisors, whose sum is σ = 897319332. Its totient is φ = 897319330.

The previous prime is 897319261. The next prime is 897319343. The reversal of 897319331 is 133913798.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897319331 is a prime.

It is a super-2 number, since 2×897319331² = 1610363963572575122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (897319361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448659665 + 448659666.

It is an arithmetic number, because the mean of its divisors is an integer number (448659666).

Almost surely, 2^897319331 is an apocalyptic number.

897319331 is a deficient number, since it is larger than the sum of its proper divisors (1).

897319331 is an equidigital number, since it uses as much as digits as its factorization.

897319331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 897319331 is about 29955.2888652405. The cubic root of 897319331 is about 964.5298544757.

The spelling of 897319331 in words is "eight hundred ninety-seven million, three hundred nineteen thousand, three hundred thirty-one".