3853607921 has 2 divisors, whose sum is σ = 3853607922. Its totient is φ = 3853607920.

The previous prime is 3853607903. The next prime is 3853607929. The reversal of 3853607921 is 1297063583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3075811600 + 777796321 = 55460^2 + 27889^2 .

It is an emirp because it is prime and its reverse (1297063583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3853607921 - 2¹⁸ = 3853345777 is a prime.

It is not a weakly prime, because it can be changed into another prime (3853607929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1926803960 + 1926803961.

It is an arithmetic number, because the mean of its divisors is an integer number (1926803961).

Almost surely, 2^3853607921 is an apocalyptic number.

It is an amenable number.

3853607921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3853607921 is an equidigital number, since it uses as much as digits as its factorization.

3853607921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 3853607921 is about 62077.4348777396. The cubic root of 3853607921 is about 1567.7946399596.

The spelling of 3853607921 in words is "three billion, eight hundred fifty-three million, six hundred seven thousand, nine hundred twenty-one".