33985391 has 6 divisors (see below), whose sum is σ = 37355976. Its totient is φ = 30895700.

The previous prime is 33985339. The next prime is 33985403. The reversal of 33985391 is 19358933.

33985391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 33985391 - 2¹⁸ = 33723247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33985321) 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 5 ways as a sum of consecutive naturals, for example, 140315 + ... + 140556.

It is an arithmetic number, because the mean of its divisors is an integer number (6225996).

Almost surely, 2^33985391 is an apocalyptic number.

33985391 is a deficient number, since it is larger than the sum of its proper divisors (3370585).

33985391 is a wasteful number, since it uses less digits than its factorization.

33985391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280893 (or 280882 counting only the distinct ones).

The product of its digits is 87480, while the sum is 41.

The square root of 33985391 is about 5829.6990488361. The cubic root of 33985391 is about 323.9147739817.

The spelling of 33985391 in words is "thirty-three million, nine hundred eighty-five thousand, three hundred ninety-one".