33693989 has 16 divisors (see below), whose sum is σ = 39223296. Its totient is φ = 28350000.

The previous prime is 33693943. The next prime is 33693991. The reversal of 33693989 is 98939633.

It is not a de Polignac number, because 33693989 - 2⁸ = 33693733 is a prime.

It is a super-2 number, since 2×33693989² = 2270569789464242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33693889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134114 + ... + 134364.

It is an arithmetic number, because the mean of its divisors is an integer number (2451456).

Almost surely, 2^33693989 is an apocalyptic number.

It is an amenable number.

33693989 is a deficient number, since it is larger than the sum of its proper divisors (5529307).

33693989 is a wasteful number, since it uses less digits than its factorization.

33693989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536.

The product of its digits is 944784, while the sum is 50.

The square root of 33693989 is about 5804.6523582382. The cubic root of 33693989 is about 322.9863311222.

The spelling of 33693989 in words is "thirty-three million, six hundred ninety-three thousand, nine hundred eighty-nine".