3581623 has 4 divisors (see below), whose sum is σ = 3627040. Its totient is φ = 3536208.

The previous prime is 3581621. The next prime is 3581639. The reversal of 3581623 is 3261853.

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 3581623 - 2¹ = 3581621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3581591 and 3581600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3581621) 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, 22590 + ... + 22747.

It is an arithmetic number, because the mean of its divisors is an integer number (906760).

Almost surely, 2^3581623 is an apocalyptic number.

3581623 is a deficient number, since it is larger than the sum of its proper divisors (45417).

3581623 is an equidigital number, since it uses as much as digits as its factorization.

3581623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45416.

The product of its digits is 4320, while the sum is 28.

The square root of 3581623 is about 1892.5176353207. The cubic root of 3581623 is about 153.0006550159. Note that the first 3 decimals are identical.

The spelling of 3581623 in words is "three million, five hundred eighty-one thousand, six hundred twenty-three".