3621403 has 2 divisors, whose sum is σ = 3621404. Its totient is φ = 3621402.

The previous prime is 3621379. The next prime is 3621461. The reversal of 3621403 is 3041263.

3621403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3621403 is a prime.

It is a super-2 number, since 2×3621403² = 26229119376818, which contains 22 as substring.

3621403 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3621463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1810701 + 1810702.

It is an arithmetic number, because the mean of its divisors is an integer number (1810702).

Almost surely, 2^3621403 is an apocalyptic number.

3621403 is a deficient number, since it is larger than the sum of its proper divisors (1).

3621403 is an equidigital number, since it uses as much as digits as its factorization.

3621403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 3621403 is about 1902.9984235411. The cubic root of 3621403 is about 153.5650147055.

Adding to 3621403 its reverse (3041263), we get a palindrome (6662666).

The spelling of 3621403 in words is "three million, six hundred twenty-one thousand, four hundred three".