33989743 has 4 divisors (see below), whose sum is σ = 34033720. Its totient is φ = 33945768.

The previous prime is 33989719. The next prime is 33989819. The reversal of 33989743 is 34798933.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33989743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33989693 and 33989702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33989843) 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, 20808 + ... + 22381.

It is an arithmetic number, because the mean of its divisors is an integer number (8508430).

Almost surely, 2^33989743 is an apocalyptic number.

33989743 is a deficient number, since it is larger than the sum of its proper divisors (43977).

33989743 is an equidigital number, since it uses as much as digits as its factorization.

33989743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43976.

The product of its digits is 489888, while the sum is 46.

The square root of 33989743 is about 5830.0722980080. The cubic root of 33989743 is about 323.9285996961.

The spelling of 33989743 in words is "thirty-three million, nine hundred eighty-nine thousand, seven hundred forty-three".