997485871 has 2 divisors, whose sum is σ = 997485872. Its totient is φ = 997485870.

The previous prime is 997485869. The next prime is 997485899. The reversal of 997485871 is 178584799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 997485871 - 2¹ = 997485869 is a prime.

Together with 997485869, 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 (997485851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498742935 + 498742936.

It is an arithmetic number, because the mean of its divisors is an integer number (498742936).

Almost surely, 2^997485871 is an apocalyptic number.

997485871 is a deficient number, since it is larger than the sum of its proper divisors (1).

997485871 is an equidigital number, since it uses as much as digits as its factorization.

997485871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 58.

The square root of 997485871 is about 31582.9997150366. Note that the first 3 decimals coincide. The cubic root of 997485871 is about 999.1612537013.

The spelling of 997485871 in words is "nine hundred ninety-seven million, four hundred eighty-five thousand, eight hundred seventy-one".