33913989 has 12 divisors (see below), whose sum is σ = 49608000. Its totient is φ = 22322664.

The previous prime is 33913981. The next prime is 33913991. The reversal of 33913989 is 98931933.

It is not a de Polignac number, because 33913989 - 2³ = 33913981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33913981) 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 in 11 ways as a sum of consecutive naturals, for example, 23139 + ... + 24560.

It is an arithmetic number, because the mean of its divisors is an integer number (4134000).

Almost surely, 2^33913989 is an apocalyptic number.

It is an amenable number.

33913989 is a deficient number, since it is larger than the sum of its proper divisors (15694011).

33913989 is a wasteful number, since it uses less digits than its factorization.

33913989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47784 (or 47781 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 33913989 is about 5823.5718420914. The cubic root of 33913989 is about 323.6877707698.

The spelling of 33913989 in words is "thirty-three million, nine hundred thirteen thousand, nine hundred eighty-nine".