3621623 has 2 divisors, whose sum is σ = 3621624. Its totient is φ = 3621622.

The previous prime is 3621617. The next prime is 3621643. The reversal of 3621623 is 3261263.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3621623 - 2⁶ = 3621559 is a prime.

It is a d-powerful number, because it can be written as 3 + 6⁸ + 2¹⁷ + 1 + 6⁸ + 2¹⁷ + 3⁵ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3621613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1810811 + 1810812.

It is an arithmetic number, because the mean of its divisors is an integer number (1810812).

Almost surely, 2^3621623 is an apocalyptic number.

3621623 is a deficient number, since it is larger than the sum of its proper divisors (1).

3621623 is an equidigital number, since it uses as much as digits as its factorization.

3621623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 23.

The square root of 3621623 is about 1903.0562261794. The cubic root of 3621623 is about 153.5681243308.

Adding to 3621623 its reverse (3261263), we get a palindrome (6882886).

The spelling of 3621623 in words is "three million, six hundred twenty-one thousand, six hundred twenty-three".