3706403621 has 2 divisors, whose sum is σ = 3706403622. Its totient is φ = 3706403620.

The previous prime is 3706403599. The next prime is 3706403629. The reversal of 3706403621 is 1263046073.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2679201121 + 1027202500 = 51761^2 + 32050^2 .

It is a cyclic number.

It is not a de Polignac number, because 3706403621 - 2¹⁸ = 3706141477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3706403629) 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, 1853201810 + 1853201811.

It is an arithmetic number, because the mean of its divisors is an integer number (1853201811).

Almost surely, 2^3706403621 is an apocalyptic number.

It is an amenable number.

3706403621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3706403621 is an equidigital number, since it uses as much as digits as its factorization.

3706403621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 3706403621 is about 60880.2399880290. The cubic root of 3706403621 is about 1547.5721437323.

Adding to 3706403621 its reverse (1263046073), we get a palindrome (4969449694).

The spelling of 3706403621 in words is "three billion, seven hundred six million, four hundred three thousand, six hundred twenty-one".