33999989 has 8 divisors (see below), whose sum is σ = 34700640. Its totient is φ = 33303600.

The previous prime is 33999967. The next prime is 34000009. The reversal of 33999989 is 98999933.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33999989 - 2²⁴ = 17222773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33999089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18659 + ... + 20399.

It is an arithmetic number, because the mean of its divisors is an integer number (4337580).

Almost surely, 2^33999989 is an apocalyptic number.

It is an amenable number.

33999989 is a deficient number, since it is larger than the sum of its proper divisors (700651).

33999989 is a wasteful number, since it uses less digits than its factorization.

33999989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131.

The product of its digits is 4251528, while the sum is 59.

The square root of 33999989 is about 5830.9509516030. The cubic root of 33999989 is about 323.9611451908.

The spelling of 33999989 in words is "thirty-three million, nine hundred ninety-nine thousand, nine hundred eighty-nine".