897767791 has 2 divisors, whose sum is σ = 897767792. Its totient is φ = 897767790.

The previous prime is 897767729. The next prime is 897767813. The reversal of 897767791 is 197767798.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 897767791 - 2⁹ = 897767279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (897737791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448883895 + 448883896.

It is an arithmetic number, because the mean of its divisors is an integer number (448883896).

Almost surely, 2^897767791 is an apocalyptic number.

897767791 is a deficient number, since it is larger than the sum of its proper divisors (1).

897767791 is an equidigital number, since it uses as much as digits as its factorization.

897767791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9335088, while the sum is 61.

The square root of 897767791 is about 29962.7734196953. The cubic root of 897767791 is about 964.6905111500.

The spelling of 897767791 in words is "eight hundred ninety-seven million, seven hundred sixty-seven thousand, seven hundred ninety-one".