3654887221 has 2 divisors, whose sum is σ = 3654887222. Its totient is φ = 3654887220.

The previous prime is 3654887213. The next prime is 3654887263. The reversal of 3654887221 is 1227884563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2953379025 + 701508196 = 54345^2 + 26486^2 .

It is a cyclic number.

It is not a de Polignac number, because 3654887221 - 2³ = 3654887213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3654887281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1827443610 + 1827443611.

It is an arithmetic number, because the mean of its divisors is an integer number (1827443611).

Almost surely, 2^3654887221 is an apocalyptic number.

It is an amenable number.

3654887221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3654887221 is an equidigital number, since it uses as much as digits as its factorization.

3654887221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 46.

The square root of 3654887221 is about 60455.6632665625. The cubic root of 3654887221 is about 1540.3686109535.

The spelling of 3654887221 in words is "three billion, six hundred fifty-four million, eight hundred eighty-seven thousand, two hundred twenty-one".