9223991997 has 64 divisors (see below), whose sum is σ = 14657664000. Its totient is φ = 5098567680.

The previous prime is 9223991993. The next prime is 9223992007. The reversal of 9223991997 is 7991993229.

9223991997 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9223991997 - 2² = 9223991993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9223991997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9223991993) 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 in 63 ways as a sum of consecutive naturals, for example, 2248254 + ... + 2252352.

It is an arithmetic number, because the mean of its divisors is an integer number (229026000).

Almost surely, 2^9223991997 is an apocalyptic number.

9223991997 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

It is an amenable number.

9223991997 is a deficient number, since it is larger than the sum of its proper divisors (5433672003).

9223991997 is a wasteful number, since it uses less digits than its factorization.

9223991997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4266.

The product of its digits is 4960116, while the sum is 60.

The square root of 9223991997 is about 96041.6159641226. The cubic root of 9223991997 is about 2097.1989864862.

The spelling of 9223991997 in words is "nine billion, two hundred twenty-three million, nine hundred ninety-one thousand, nine hundred ninety-seven".