33029989 has 4 divisors (see below), whose sum is σ = 33048556. Its totient is φ = 33011424.

The previous prime is 33029987. The next prime is 33030007. The reversal of 33029989 is 98992033.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23357889 + 9672100 = 4833^2 + 3110^2 .

It is a cyclic number.

It is not a de Polignac number, because 33029989 - 2¹ = 33029987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33029987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6294 + ... + 10279.

It is an arithmetic number, because the mean of its divisors is an integer number (8262139).

Almost surely, 2^33029989 is an apocalyptic number.

It is an amenable number.

33029989 is a deficient number, since it is larger than the sum of its proper divisors (18567).

33029989 is a wasteful number, since it uses less digits than its factorization.

33029989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18566.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 33029989 is about 5747.1722612081. The cubic root of 33029989 is about 320.8505659528.

The spelling of 33029989 in words is "thirty-three million, twenty-nine thousand, nine hundred eighty-nine".