897543799 has 2 divisors, whose sum is σ = 897543800. Its totient is φ = 897543798.

The previous prime is 897543797. The next prime is 897543821. The reversal of 897543799 is 997345798.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 897543799 - 2¹ = 897543797 is a prime.

It is a super-2 number, since 2×897543799² = 1611169742246704802, which contains 22 as substring.

Together with 897543797, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (897543791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448771899 + 448771900.

It is an arithmetic number, because the mean of its divisors is an integer number (448771900).

Almost surely, 2^897543799 is an apocalyptic number.

897543799 is a deficient number, since it is larger than the sum of its proper divisors (1).

897543799 is an equidigital number, since it uses as much as digits as its factorization.

897543799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17146080, while the sum is 61.

The square root of 897543799 is about 29959.0353482885. The cubic root of 897543799 is about 964.6102747635.

The spelling of 897543799 in words is "eight hundred ninety-seven million, five hundred forty-three thousand, seven hundred ninety-nine".