33728923 has 2 divisors, whose sum is σ = 33728924. Its totient is φ = 33728922.

The previous prime is 33728921. The next prime is 33728957. The reversal of 33728923 is 32982733.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 33728923 - 2¹ = 33728921 is a prime.

It is a super-2 number, since 2×33728923² = 2275280493479858, which contains 22 as substring.

Together with 33728921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (33728921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16864461 + 16864462.

It is an arithmetic number, because the mean of its divisors is an integer number (16864462).

Almost surely, 2^33728923 is an apocalyptic number.

33728923 is a deficient number, since it is larger than the sum of its proper divisors (1).

33728923 is an equidigital number, since it uses as much as digits as its factorization.

33728923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 33728923 is about 5807.6607166741. The cubic root of 33728923 is about 323.0979168738.

The spelling of 33728923 in words is "thirty-three million, seven hundred twenty-eight thousand, nine hundred twenty-three".