33989609 has 12 divisors (see below), whose sum is σ = 35545428. Its totient is φ = 32497920.

The previous prime is 33989591. The next prime is 33989611. The reversal of 33989609 is 90698933.

It can be written as a sum of positive squares in 2 ways, for example, as 384400 + 33605209 = 620^2 + 5797^2 .

It is not a de Polignac number, because 33989609 - 2⁸ = 33989353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33989629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108437 + ... + 108749.

It is an arithmetic number, because the mean of its divisors is an integer number (2962119).

Almost surely, 2^33989609 is an apocalyptic number.

It is an amenable number.

33989609 is a deficient number, since it is larger than the sum of its proper divisors (1555819).

33989609 is a wasteful number, since it uses less digits than its factorization.

33989609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 33989609 is about 5830.0608058579. The cubic root of 33989609 is about 323.9281740139.

The spelling of 33989609 in words is "thirty-three million, nine hundred eighty-nine thousand, six hundred nine".