33409961 has 16 divisors (see below), whose sum is σ = 39527040. Its totient is φ = 27941760.

The previous prime is 33409949. The next prime is 33409963. The reversal of 33409961 is 16990433.

It is a cyclic number.

It is not a de Polignac number, because 33409961 - 2⁶ = 33409897 is a prime.

It is a super-2 number, since 2×33409961² = 2232450988043042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33409963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2741 + ... + 8621.

It is an arithmetic number, because the mean of its divisors is an integer number (2470440).

Almost surely, 2^33409961 is an apocalyptic number.

It is an amenable number.

33409961 is a deficient number, since it is larger than the sum of its proper divisors (6117079).

33409961 is a wasteful number, since it uses less digits than its factorization.

33409961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5936.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 33409961 is about 5780.1350330247. The cubic root of 33409961 is about 322.0762168000.

The spelling of 33409961 in words is "thirty-three million, four hundred nine thousand, nine hundred sixty-one".