997173333 has 36 divisors (see below), whose sum is σ = 1637164620. Its totient is φ = 581323392.

The previous prime is 997173329. The next prime is 997173343. The reversal of 997173333 is 333371799.

It can be written as a sum of positive squares in 2 ways, for example, as 148791204 + 848382129 = 12198^2 + 29127^2 .

It is not a de Polignac number, because 997173333 - 2² = 997173329 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997173343) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30433 + ... + 54041.

It is an arithmetic number, because the mean of its divisors is an integer number (45476795).

Almost surely, 2^997173333 is an apocalyptic number.

It is an amenable number.

997173333 is a deficient number, since it is larger than the sum of its proper divisors (639991287).

997173333 is a wasteful number, since it uses less digits than its factorization.

997173333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23666 (or 23644 counting only the distinct ones).

The product of its digits is 321489, while the sum is 45.

The square root of 997173333 is about 31578.0514440014. The cubic root of 997173333 is about 999.0568884870.

The spelling of 997173333 in words is "nine hundred ninety-seven million, one hundred seventy-three thousand, three hundred thirty-three".