33954721 has 4 divisors (see below), whose sum is σ = 33971092. Its totient is φ = 33938352.

The previous prime is 33954707. The next prime is 33954733. The reversal of 33954721 is 12745933.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12745933 = 23 ⋅554171.

It can be written as a sum of positive squares in 2 ways, for example, as 33223696 + 731025 = 5764^2 + 855^2 .

It is a cyclic number.

It is not a de Polignac number, because 33954721 - 2⁹ = 33954209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33954751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4530 + ... + 9403.

It is an arithmetic number, because the mean of its divisors is an integer number (8492773).

Almost surely, 2^33954721 is an apocalyptic number.

It is an amenable number.

33954721 is a deficient number, since it is larger than the sum of its proper divisors (16371).

33954721 is a wasteful number, since it uses less digits than its factorization.

33954721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16370.

The product of its digits is 22680, while the sum is 34.

The square root of 33954721 is about 5827.0679591026. The cubic root of 33954721 is about 323.8173060623.

The spelling of 33954721 in words is "thirty-three million, nine hundred fifty-four thousand, seven hundred twenty-one".