33490081 has 4 divisors (see below), whose sum is σ = 33509700. Its totient is φ = 33470464.

The previous prime is 33490073. The next prime is 33490091. The reversal of 33490081 is 18009433.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18009433 = 13 ⋅1385341.

It can be written as a sum of positive squares in 2 ways, for example, as 19360000 + 14130081 = 4400^2 + 3759^2 .

It is a cyclic number.

It is not a de Polignac number, because 33490081 - 2³ = 33490073 is a prime.

It is a super-2 number, since 2×33490081² = 2243171050773122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33490031) 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 3 ways as a sum of consecutive naturals, for example, 6976 + ... + 10753.

It is an arithmetic number, because the mean of its divisors is an integer number (8377425).

Almost surely, 2^33490081 is an apocalyptic number.

It is an amenable number.

33490081 is a deficient number, since it is larger than the sum of its proper divisors (19619).

33490081 is a wasteful number, since it uses less digits than its factorization.

33490081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19618.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 33490081 is about 5787.0615168667. The cubic root of 33490081 is about 322.3334668916. Note that the first 3 decimals are identical.

The spelling of 33490081 in words is "thirty-three million, four hundred ninety thousand, eighty-one".