33040691 has 4 divisors (see below), whose sum is σ = 33169512. Its totient is φ = 32911872.

The previous prime is 33040669. The next prime is 33040697. The reversal of 33040691 is 19604033.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19604033 = 479 ⋅40927.

It is a cyclic number.

It is not a de Polignac number, because 33040691 - 2¹⁴ = 33024307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33040691.

It is not an unprimeable number, because it can be changed into a prime (33040697) 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, 64025 + ... + 64538.

It is an arithmetic number, because the mean of its divisors is an integer number (8292378).

Almost surely, 2^33040691 is an apocalyptic number.

33040691 is a deficient number, since it is larger than the sum of its proper divisors (128821).

33040691 is a wasteful number, since it uses less digits than its factorization.

33040691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128820.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 33040691 is about 5748.1032523781. The cubic root of 33040691 is about 320.8852149902.

The spelling of 33040691 in words is "thirty-three million, forty thousand, six hundred ninety-one".