33421939 has 2 divisors, whose sum is σ = 33421940. Its totient is φ = 33421938.

The previous prime is 33421889. The next prime is 33421943. The reversal of 33421939 is 93912433.

It is a strong prime.

It is an emirp because it is prime and its reverse (93912433) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33421939 - 2¹⁵ = 33389171 is a prime.

It is a super-2 number, since 2×33421939² = 2234052013039442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33421979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16710969 + 16710970.

It is an arithmetic number, because the mean of its divisors is an integer number (16710970).

Almost surely, 2^33421939 is an apocalyptic number.

33421939 is a deficient number, since it is larger than the sum of its proper divisors (1).

33421939 is an equidigital number, since it uses as much as digits as its factorization.

33421939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 34.

The square root of 33421939 is about 5781.1710751369. The cubic root of 33421939 is about 322.1147020089.

The spelling of 33421939 in words is "thirty-three million, four hundred twenty-one thousand, nine hundred thirty-nine".