997445871 has 6 divisors (see below), whose sum is σ = 1440755160. Its totient is φ = 664963908.

The previous prime is 997445857. The next prime is 997445881. The reversal of 997445871 is 178544799.

It is not a de Polignac number, because 997445871 - 2⁹ = 997445359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997445881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55413651 + ... + 55413668.

It is an arithmetic number, because the mean of its divisors is an integer number (240125860).

Almost surely, 2^997445871 is an apocalyptic number.

997445871 is a deficient number, since it is larger than the sum of its proper divisors (443309289).

997445871 is a wasteful number, since it uses less digits than its factorization.

997445871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110827325 (or 110827322 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 997445871 is about 31582.3664566163. The cubic root of 997445871 is about 999.1478977947.

The spelling of 997445871 in words is "nine hundred ninety-seven million, four hundred forty-five thousand, eight hundred seventy-one".