33981919 has 2 divisors, whose sum is σ = 33981920. Its totient is φ = 33981918.

The previous prime is 33981917. The next prime is 33981953. The reversal of 33981919 is 91918933.

33981919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 33981919 - 2¹ = 33981917 is a prime.

It is a super-2 number, since 2×33981919² = 2309541637845122, which contains 22 as substring.

Together with 33981917, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33981917) 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 as a sum of consecutive naturals, namely, 16990959 + 16990960.

It is an arithmetic number, because the mean of its divisors is an integer number (16990960).

Almost surely, 2^33981919 is an apocalyptic number.

33981919 is a deficient number, since it is larger than the sum of its proper divisors (1).

33981919 is an equidigital number, since it uses as much as digits as its factorization.

33981919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 43.

The square root of 33981919 is about 5829.4012557037. The cubic root of 33981919 is about 323.9037430617.

The spelling of 33981919 in words is "thirty-three million, nine hundred eighty-one thousand, nine hundred nineteen".