3616621 has 2 divisors, whose sum is σ = 3616622. Its totient is φ = 3616620.

The previous prime is 3616583. The next prime is 3616633. The reversal of 3616621 is 1266163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3572100 + 44521 = 1890^2 + 211^2 .

It is an emirp because it is prime and its reverse (1266163) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3616621 - 2¹⁷ = 3485549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3616661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1808310 + 1808311.

It is an arithmetic number, because the mean of its divisors is an integer number (1808311).

Almost surely, 2^3616621 is an apocalyptic number.

It is an amenable number.

3616621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3616621 is an equidigital number, since it uses as much as digits as its factorization.

3616621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 3616621 is about 1901.7415702455. The cubic root of 3616621 is about 153.4973916168.

The spelling of 3616621 in words is "three million, six hundred sixteen thousand, six hundred twenty-one".