3628621 has 2 divisors, whose sum is σ = 3628622. Its totient is φ = 3628620.

The previous prime is 3628591. The next prime is 3628631. The reversal of 3628621 is 1268263.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2449225 + 1179396 = 1565^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 3628621 - 2²¹ = 1531469 is a prime.

It is a super-3 number, since 3×3628621³ (a number of 21 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3628621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3628631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1814310 + 1814311.

It is an arithmetic number, because the mean of its divisors is an integer number (1814311).

Almost surely, 2^3628621 is an apocalyptic number.

It is an amenable number.

3628621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3628621 is an equidigital number, since it uses as much as digits as its factorization.

3628621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 3628621 is about 1904.8939603033. The cubic root of 3628621 is about 153.6669730410. Note that the first 3 decimals are identical.

The spelling of 3628621 in words is "three million, six hundred twenty-eight thousand, six hundred twenty-one".