33421387 has 2 divisors, whose sum is σ = 33421388. Its totient is φ = 33421386.

The previous prime is 33421331. The next prime is 33421411. The reversal of 33421387 is 78312433.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 33421387 - 2⁷ = 33421259 is a prime.

It is a super-2 number, since 2×33421387² = 2233978218007538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33421307) 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 as a sum of consecutive naturals, namely, 16710693 + 16710694.

It is an arithmetic number, because the mean of its divisors is an integer number (16710694).

Almost surely, 2^33421387 is an apocalyptic number.

33421387 is a deficient number, since it is larger than the sum of its proper divisors (1).

33421387 is an equidigital number, since it uses as much as digits as its factorization.

33421387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

The square root of 33421387 is about 5781.1233337475. The cubic root of 33421387 is about 322.1129286398.

The spelling of 33421387 in words is "thirty-three million, four hundred twenty-one thousand, three hundred eighty-seven".