3661303 has 2 divisors, whose sum is σ = 3661304. Its totient is φ = 3661302.

The previous prime is 3661291. The next prime is 3661327. The reversal of 3661303 is 3031663.

It is a happy number.

3661303 is nontrivially palindromic in base 4.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3661303 - 2⁵ = 3661271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3661703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830651 + 1830652.

It is an arithmetic number, because the mean of its divisors is an integer number (1830652).

Almost surely, 2^3661303 is an apocalyptic number.

3661303 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661303 is an equidigital number, since it uses as much as digits as its factorization.

3661303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 22.

The square root of 3661303 is about 1913.4531611722. The cubic root of 3661303 is about 154.1269403687.

Adding to 3661303 its reverse (3031663), we get a palindrome (6692966).

The spelling of 3661303 in words is "three million, six hundred sixty-one thousand, three hundred three".