997121344 has 28 divisors (see below), whose sum is σ = 1981878688. Its totient is φ = 497750400.

The previous prime is 997121317. The next prime is 997121347. The reversal of 997121344 is 443121799.

It is a junction number, because it is equal to n+sod(n) for n = 997121297 and 997121306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997121347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28039 + ... + 52729.

Almost surely, 2^997121344 is an apocalyptic number.

It is an amenable number.

997121344 is a deficient number, since it is larger than the sum of its proper divisors (984757344).

997121344 is a wasteful number, since it uses less digits than its factorization.

997121344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25334 (or 25324 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 997121344 is about 31577.2282507506. The cubic root of 997121344 is about 999.0395257846.

The spelling of 997121344 in words is "nine hundred ninety-seven million, one hundred twenty-one thousand, three hundred forty-four".