3681329 has 4 divisors (see below), whose sum is σ = 3685440. Its totient is φ = 3677220.

The previous prime is 3681319. The next prime is 3681341. The reversal of 3681329 is 9231863.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3681329 - 2¹⁶ = 3615793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3681295 and 3681304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3681319) 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, 77 + ... + 2714.

It is an arithmetic number, because the mean of its divisors is an integer number (921360).

Almost surely, 2^3681329 is an apocalyptic number.

It is an amenable number.

3681329 is a deficient number, since it is larger than the sum of its proper divisors (4111).

3681329 is a wasteful number, since it uses less digits than its factorization.

3681329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110.

The product of its digits is 7776, while the sum is 32.

The square root of 3681329 is about 1918.6789726267. The cubic root of 3681329 is about 154.4074357476.

The spelling of 3681329 in words is "three million, six hundred eighty-one thousand, three hundred twenty-nine".