3603397661 has 2 divisors, whose sum is σ = 3603397662. Its totient is φ = 3603397660.

The previous prime is 3603397657. The next prime is 3603397663. The reversal of 3603397661 is 1667933063.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2711180761 + 892216900 = 52069^2 + 29870^2 .

It is a cyclic number.

It is not a de Polignac number, because 3603397661 - 2² = 3603397657 is a prime.

Together with 3603397663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3603397663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1801698830 + 1801698831.

It is an arithmetic number, because the mean of its divisors is an integer number (1801698831).

Almost surely, 2^3603397661 is an apocalyptic number.

It is an amenable number.

3603397661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3603397661 is an equidigital number, since it uses as much as digits as its factorization.

3603397661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 44.

The square root of 3603397661 is about 60028.3071642038. The cubic root of 3603397661 is about 1533.1008723787.

The spelling of 3603397661 in words is "three billion, six hundred three million, three hundred ninety-seven thousand, six hundred sixty-one".