33997329 has 6 divisors (see below), whose sum is σ = 49107266. Its totient is φ = 22664880.

The previous prime is 33997321. The next prime is 33997333. The reversal of 33997329 is 92379933.

It can be written as a sum of positive squares in only one way, i.e., 33907329 + 90000 = 5823^2 + 300^2 .

It is not a de Polignac number, because 33997329 - 2³ = 33997321 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33997321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1888732 + ... + 1888749.

Almost surely, 2^33997329 is an apocalyptic number.

It is an amenable number.

33997329 is a deficient number, since it is larger than the sum of its proper divisors (15109937).

33997329 is a wasteful number, since it uses less digits than its factorization.

33997329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777487 (or 3777484 counting only the distinct ones).

The product of its digits is 275562, while the sum is 45.

The square root of 33997329 is about 5830.7228539865. The cubic root of 33997329 is about 323.9526965692.

The spelling of 33997329 in words is "thirty-three million, nine hundred ninety-seven thousand, three hundred twenty-nine".