3669036821 has 2 divisors, whose sum is σ = 3669036822. Its totient is φ = 3669036820.

The previous prime is 3669036817. The next prime is 3669036827. The reversal of 3669036821 is 1286309663.

3669036821 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2385247921 + 1283788900 = 48839^2 + 35830^2 .

It is an emirp because it is prime and its reverse (1286309663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3669036821 - 2² = 3669036817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3669036827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1834518410 + 1834518411.

It is an arithmetic number, because the mean of its divisors is an integer number (1834518411).

Almost surely, 2^3669036821 is an apocalyptic number.

It is an amenable number.

3669036821 is a deficient number, since it is larger than the sum of its proper divisors (1).

3669036821 is an equidigital number, since it uses as much as digits as its factorization.

3669036821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 3669036821 is about 60572.5748255760. The cubic root of 3669036821 is about 1542.3538553753.

The spelling of 3669036821 in words is "three billion, six hundred sixty-nine million, thirty-six thousand, eight hundred twenty-one".