3721613 has 8 divisors (see below), whose sum is σ = 4312128. Its totient is φ = 3145824.

The previous prime is 3721603. The next prime is 3721621. The reversal of 3721613 is 3161273.

It is a happy number.

3721613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3721613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721603) 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 7 ways as a sum of consecutive naturals, for example, 3131 + ... + 4152.

It is an arithmetic number, because the mean of its divisors is an integer number (539016).

Almost surely, 2^3721613 is an apocalyptic number.

It is an amenable number.

3721613 is a deficient number, since it is larger than the sum of its proper divisors (590515).

3721613 is an equidigital number, since it uses as much as digits as its factorization.

3721613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7363.

The product of its digits is 756, while the sum is 23.

The square root of 3721613 is about 1929.1482576515. The cubic root of 3721613 is about 154.9686096683.

Adding to 3721613 its reverse (3161273), we get a palindrome (6882886).

It can be divided in two parts, 3721 and 613, that added together give a palindrome (4334).

The spelling of 3721613 in words is "three million, seven hundred twenty-one thousand, six hundred thirteen".