3331729 has 4 divisors (see below), whose sum is σ = 3335476. Its totient is φ = 3327984.

The previous prime is 3331673. The next prime is 3331733. The reversal of 3331729 is 9271333.

3331729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9271333 = 2039 ⋅4547.

It can be written as a sum of positive squares in 2 ways, for example, as 2331729 + 1000000 = 1527^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 3331729 - 2⁹ = 3331217 is a prime.

It is a super-2 number, since 2×3331729² = 22200836258882, which contains 22 as substring.

It is a Duffinian number.

3331729 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3331697 and 3331706.

It is not an unprimeable number, because it can be changed into a prime (3331799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307 + ... + 2599.

It is an arithmetic number, because the mean of its divisors is an integer number (833869).

Almost surely, 2^3331729 is an apocalyptic number.

It is an amenable number.

3331729 is a deficient number, since it is larger than the sum of its proper divisors (3747).

3331729 is a wasteful number, since it uses less digits than its factorization.

3331729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3746.

The product of its digits is 3402, while the sum is 28.

The square root of 3331729 is about 1825.3024406930. The cubic root of 3331729 is about 149.3561888160.

The spelling of 3331729 in words is "three million, three hundred thirty-one thousand, seven hundred twenty-nine".