3690321 has 4 divisors (see below), whose sum is σ = 4920432. Its totient is φ = 2460212.

The previous prime is 3690307. The next prime is 3690329. The reversal of 3690321 is 1230963.

3690321 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 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 3690321 - 2⁶ = 3690257 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

3690321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3690291 and 3690300.

It is not an unprimeable number, because it can be changed into a prime (3690329) 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, 615051 + ... + 615056.

It is an arithmetic number, because the mean of its divisors is an integer number (1230108).

Almost surely, 2^3690321 is an apocalyptic number.

It is an amenable number.

3690321 is a deficient number, since it is larger than the sum of its proper divisors (1230111).

3690321 is a wasteful number, since it uses less digits than its factorization.

3690321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230110.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 3690321 is about 1921.0208223754. The cubic root of 3690321 is about 154.5330518620.

The spelling of 3690321 in words is "three million, six hundred ninety thousand, three hundred twenty-one".