3721723 has 4 divisors (see below), whose sum is σ = 3727240. Its totient is φ = 3716208.

The previous prime is 3721721. The next prime is 3721727. The reversal of 3721723 is 3271273.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3271273 = 331 ⋅9883.

It is a cyclic number.

It is not a de Polignac number, because 3721723 - 2¹ = 3721721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3721721) 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, 1578 + ... + 3151.

It is an arithmetic number, because the mean of its divisors is an integer number (931810).

Almost surely, 2^3721723 is an apocalyptic number.

3721723 is a deficient number, since it is larger than the sum of its proper divisors (5517).

3721723 is an equidigital number, since it uses as much as digits as its factorization.

3721723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5516.

The product of its digits is 1764, while the sum is 25.

The square root of 3721723 is about 1929.1767674322. The cubic root of 3721723 is about 154.9701364596.

Adding to 3721723 its reverse (3271273), we get a palindrome (6992996).

It can be divided in two parts, 3721 and 723, that added together give a palindrome (4444).

The spelling of 3721723 in words is "three million, seven hundred twenty-one thousand, seven hundred twenty-three".