3733621 has 2 divisors, whose sum is σ = 3733622. Its totient is φ = 3733620.

The previous prime is 3733607. The next prime is 3733637. The reversal of 3733621 is 1263373.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3663396 + 70225 = 1914^2 + 265^2 .

It is an emirp because it is prime and its reverse (1263373) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3733621 - 2¹⁷ = 3602549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3733021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1866810 + 1866811.

It is an arithmetic number, because the mean of its divisors is an integer number (1866811).

Almost surely, 2^3733621 is an apocalyptic number.

It is an amenable number.

3733621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3733621 is an equidigital number, since it uses as much as digits as its factorization.

3733621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 25.

The square root of 3733621 is about 1932.2580055469. The cubic root of 3733621 is about 155.1351024633.

Adding to 3733621 its reverse (1263373), we get a palindrome (4996994).

The spelling of 3733621 in words is "three million, seven hundred thirty-three thousand, six hundred twenty-one".