33401689 has 2 divisors, whose sum is σ = 33401690. Its totient is φ = 33401688.

The previous prime is 33401671. The next prime is 33401701. The reversal of 33401689 is 98610433.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33235225 + 166464 = 5765^2 + 408^2 .

It is a cyclic number.

It is not a de Polignac number, because 33401689 - 2⁹ = 33401177 is a prime.

It is a super-2 number, since 2×33401689² = 2231345656105442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33401189) 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, 16700844 + 16700845.

It is an arithmetic number, because the mean of its divisors is an integer number (16700845).

Almost surely, 2^33401689 is an apocalyptic number.

It is an amenable number.

33401689 is a deficient number, since it is larger than the sum of its proper divisors (1).

33401689 is an equidigital number, since it uses as much as digits as its factorization.

33401689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 33401689 is about 5779.4194345107. The cubic root of 33401689 is about 322.0496335666.

The spelling of 33401689 in words is "thirty-three million, four hundred one thousand, six hundred eighty-nine".