997128333 has 32 divisors (see below), whose sum is σ = 1522857600. Its totient is φ = 644450688.

The previous prime is 997128329. The next prime is 997128343. The reversal of 997128333 is 333821799.

It is not a de Polignac number, because 997128333 - 2² = 997128329 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997128343) 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 31 ways as a sum of consecutive naturals, for example, 155923 + ... + 162191.

It is an arithmetic number, because the mean of its divisors is an integer number (47589300).

Almost surely, 2^997128333 is an apocalyptic number.

It is an amenable number.

997128333 is a deficient number, since it is larger than the sum of its proper divisors (525729267).

997128333 is a wasteful number, since it uses less digits than its factorization.

997128333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6458 (or 6452 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 997128333 is about 31577.3389157478. The cubic root of 997128333 is about 999.0418599275.

The spelling of 997128333 in words is "nine hundred ninety-seven million, one hundred twenty-eight thousand, three hundred thirty-three".