33944981 has 4 divisors (see below), whose sum is σ = 38794272. Its totient is φ = 29095692.

The previous prime is 33944917. The next prime is 33944983. The reversal of 33944981 is 18944933.

33944981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 18944933 = 7 ⋅2706419.

It is a cyclic number.

It is not a de Polignac number, because 33944981 - 2⁶ = 33944917 is a prime.

It is a super-2 number, since 2×33944981² = 2304523470180722, 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 (33944983) 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, 2424635 + ... + 2424648.

It is an arithmetic number, because the mean of its divisors is an integer number (9698568).

Almost surely, 2^33944981 is an apocalyptic number.

It is an amenable number.

33944981 is a deficient number, since it is larger than the sum of its proper divisors (4849291).

33944981 is an equidigital number, since it uses as much as digits as its factorization.

33944981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4849290.

The product of its digits is 93312, while the sum is 41.

The square root of 33944981 is about 5826.2321443623. The cubic root of 33944981 is about 323.7863404892.

The spelling of 33944981 in words is "thirty-three million, nine hundred forty-four thousand, nine hundred eighty-one".