3623621 has 8 divisors (see below), whose sum is σ = 3833088. Its totient is φ = 3420000.

The previous prime is 3623597. The next prime is 3623639. The reversal of 3623621 is 1263263.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3623621 - 2¹⁴ = 3607237 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3623671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155 + ... + 2696.

It is an arithmetic number, because the mean of its divisors is an integer number (479136).

Almost surely, 2^3623621 is an apocalyptic number.

3623621 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3623621 is a deficient number, since it is larger than the sum of its proper divisors (209467).

3623621 is a wasteful number, since it uses less digits than its factorization.

3623621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2923.

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

The square root of 3623621 is about 1903.5810988765. The cubic root of 3623621 is about 153.5963596188.

Adding to 3623621 its reverse (1263263), we get a palindrome (4886884).

The spelling of 3623621 in words is "three million, six hundred twenty-three thousand, six hundred twenty-one".