33481389 has 4 divisors (see below), whose sum is σ = 44641856. Its totient is φ = 22320924.

The previous prime is 33481369. The next prime is 33481397. The reversal of 33481389 is 98318433.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98318433 = 3 ⋅32772811.

It is a de Polignac number, because none of the positive numbers 2^k-33481389 is a prime.

It is a super-2 number, since 2×33481389² = 2242006818738642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33481309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5580229 + ... + 5580234.

It is an arithmetic number, because the mean of its divisors is an integer number (11160464).

Almost surely, 2^33481389 is an apocalyptic number.

It is an amenable number.

33481389 is a deficient number, since it is larger than the sum of its proper divisors (11160467).

33481389 is a wasteful number, since it uses less digits than its factorization.

33481389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11160466.

The product of its digits is 62208, while the sum is 39.

The square root of 33481389 is about 5786.3104825096. The cubic root of 33481389 is about 322.3055783862.

The spelling of 33481389 in words is "thirty-three million, four hundred eighty-one thousand, three hundred eighty-nine".