997924871 has 16 divisors (see below), whose sum is σ = 1094627520. Its totient is φ = 905963520.

The previous prime is 997924861. The next prime is 997924877. The reversal of 997924871 is 178429799.

997924871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997924871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997924877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53990 + ... + 70076.

It is an arithmetic number, because the mean of its divisors is an integer number (68414220).

Almost surely, 2^997924871 is an apocalyptic number.

997924871 is a deficient number, since it is larger than the sum of its proper divisors (96702649).

997924871 is a wasteful number, since it uses less digits than its factorization.

997924871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16234.

The product of its digits is 2286144, while the sum is 56.

The square root of 997924871 is about 31589.9488920131. The cubic root of 997924871 is about 999.3078113187.

The spelling of 997924871 in words is "nine hundred ninety-seven million, nine hundred twenty-four thousand, eight hundred seventy-one".