3687353221 has 2 divisors, whose sum is σ = 3687353222. Its totient is φ = 3687353220.

The previous prime is 3687353207. The next prime is 3687353231. The reversal of 3687353221 is 1223537863.

3687353221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3649972225 + 37380996 = 60415^2 + 6114^2 .

It is an emirp because it is prime and its reverse (1223537863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3687353221 - 2¹⁵ = 3687320453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3687353231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1843676610 + 1843676611.

It is an arithmetic number, because the mean of its divisors is an integer number (1843676611).

Almost surely, 2^3687353221 is an apocalyptic number.

It is an amenable number.

3687353221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3687353221 is an equidigital number, since it uses as much as digits as its factorization.

3687353221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 40.

The square root of 3687353221 is about 60723.5804362687. The cubic root of 3687353221 is about 1544.9161527305.

The spelling of 3687353221 in words is "three billion, six hundred eighty-seven million, three hundred fifty-three thousand, two hundred twenty-one".