33481989 has 12 divisors (see below), whose sum is σ = 48531756. Its totient is φ = 22243392.

The previous prime is 33481957. The next prime is 33481991. The reversal of 33481989 is 98918433.

It can be written as a sum of positive squares in 2 ways, for example, as 20629764 + 12852225 = 4542^2 + 3585^2 .

It is not a de Polignac number, because 33481989 - 2⁵ = 33481957 is a prime.

It is a super-2 number, since 2×33481989² = 2242087174792242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33481909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3712 + ... + 8985.

It is an arithmetic number, because the mean of its divisors is an integer number (4044313).

Almost surely, 2^33481989 is an apocalyptic number.

It is an amenable number.

33481989 is a deficient number, since it is larger than the sum of its proper divisors (15049767).

33481989 is a wasteful number, since it uses less digits than its factorization.

33481989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12996 (or 12993 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 33481989 is about 5786.3623287865. The cubic root of 33481989 is about 322.3075036567.

The spelling of 33481989 in words is "thirty-three million, four hundred eighty-one thousand, nine hundred eighty-nine".