3621823 has 4 divisors (see below), whose sum is σ = 3738688. Its totient is φ = 3504960.

The previous prime is 3621803. The next prime is 3621851. The reversal of 3621823 is 3281263.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3281263 = 29 ⋅113147.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3621823 is a prime.

It is a Duffinian number.

3621823 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621803) 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, 58386 + ... + 58447.

It is an arithmetic number, because the mean of its divisors is an integer number (934672).

Almost surely, 2^3621823 is an apocalyptic number.

3621823 is a deficient number, since it is larger than the sum of its proper divisors (116865).

3621823 is a wasteful number, since it uses less digits than its factorization.

3621823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116864.

The product of its digits is 1728, while the sum is 25.

The square root of 3621823 is about 1903.1087725088. The cubic root of 3621823 is about 153.5709511536.

It can be divided in two parts, 3621 and 823, that added together give a palindrome (4444).

The spelling of 3621823 in words is "three million, six hundred twenty-one thousand, eight hundred twenty-three".