997159312 has 20 divisors (see below), whose sum is σ = 1945899760. Its totient is φ = 494991648.

The previous prime is 997159301. The next prime is 997159333. The reversal of 997159312 is 213951799.

It is an unprimeable number.

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, 221958 + ... + 226405.

It is an arithmetic number, because the mean of its divisors is an integer number (97294988).

Almost surely, 2^997159312 is an apocalyptic number.

It is an amenable number.

997159312 is a deficient number, since it is larger than the sum of its proper divisors (948740448).

997159312 is a wasteful number, since it uses less digits than its factorization.

997159312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448510 (or 448504 counting only the distinct ones).

The product of its digits is 153090, while the sum is 46.

The square root of 997159312 is about 31577.8294377559. The cubic root of 997159312 is about 999.0522059703.

The spelling of 997159312 in words is "nine hundred ninety-seven million, one hundred fifty-nine thousand, three hundred twelve".