897917071 has 2 divisors, whose sum is σ = 897917072. Its totient is φ = 897917070.

The previous prime is 897917021. The next prime is 897917089. The reversal of 897917071 is 170719798.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 897917071 - 2¹⁵ = 897884303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (897917021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448958535 + 448958536.

It is an arithmetic number, because the mean of its divisors is an integer number (448958536).

Almost surely, 2^897917071 is an apocalyptic number.

897917071 is a deficient number, since it is larger than the sum of its proper divisors (1).

897917071 is an equidigital number, since it uses as much as digits as its factorization.

897917071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222264, while the sum is 49.

The square root of 897917071 is about 29965.2644073100. The cubic root of 897917071 is about 964.7439774693.

The spelling of 897917071 in words is "eight hundred ninety-seven million, nine hundred seventeen thousand, seventy-one".