3283729 has 4 divisors (see below), whose sum is σ = 3323376. Its totient is φ = 3244084.

The previous prime is 3283727. The next prime is 3283747. The reversal of 3283729 is 9273823.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3283729 - 2¹ = 3283727 is a prime.

It is a super-2 number, since 2×3283729² = 21565752290882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3283694 and 3283703.

It is not an unprimeable number, because it can be changed into a prime (3283727) 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, 19699 + ... + 19864.

It is an arithmetic number, because the mean of its divisors is an integer number (830844).

Almost surely, 2^3283729 is an apocalyptic number.

It is an amenable number.

3283729 is a deficient number, since it is larger than the sum of its proper divisors (39647).

3283729 is an equidigital number, since it uses as much as digits as its factorization.

3283729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39646.

The product of its digits is 18144, while the sum is 34.

The square root of 3283729 is about 1812.1062330890. The cubic root of 3283729 is about 148.6354615767.

The spelling of 3283729 in words is "three million, two hundred eighty-three thousand, seven hundred twenty-nine".