3721823 has 4 divisors (see below), whose sum is σ = 4253520. Its totient is φ = 3190128.

The previous prime is 3721813. The next prime is 3721847. The reversal of 3721823 is 3281273.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3721823 - 2⁴ = 3721807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3721792 and 3721801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265838 + ... + 265851.

It is an arithmetic number, because the mean of its divisors is an integer number (1063380).

Almost surely, 2^3721823 is an apocalyptic number.

3721823 is a deficient number, since it is larger than the sum of its proper divisors (531697).

3721823 is an equidigital number, since it uses as much as digits as its factorization.

3721823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531696.

The product of its digits is 2016, while the sum is 26.

The square root of 3721823 is about 1929.2026850489. The cubic root of 3721823 is about 154.9715244256.

The spelling of 3721823 in words is "three million, seven hundred twenty-one thousand, eight hundred twenty-three".