33129697 has 4 divisors (see below), whose sum is σ = 33312916. Its totient is φ = 32946480.

The previous prime is 33129653. The next prime is 33129709. The reversal of 33129697 is 79692133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79692133 = 2843 ⋅28031.

It can be written as a sum of positive squares in 2 ways, for example, as 136161 + 32993536 = 369^2 + 5744^2 .

It is a cyclic number.

It is not a de Polignac number, because 33129697 - 2¹⁵ = 33096929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33129647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91338 + ... + 91699.

It is an arithmetic number, because the mean of its divisors is an integer number (8328229).

Almost surely, 2^33129697 is an apocalyptic number.

It is an amenable number.

33129697 is a deficient number, since it is larger than the sum of its proper divisors (183219).

33129697 is a wasteful number, since it uses less digits than its factorization.

33129697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183218.

The product of its digits is 61236, while the sum is 40.

The square root of 33129697 is about 5755.8402514316. The cubic root of 33129697 is about 321.1730933708.

The spelling of 33129697 in words is "thirty-three million, one hundred twenty-nine thousand, six hundred ninety-seven".