3885449921 has 2 divisors, whose sum is σ = 3885449922. Its totient is φ = 3885449920.

The previous prime is 3885449851. The next prime is 3885449923. The reversal of 3885449921 is 1299445883.

3885449921 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., 2747332225 + 1138117696 = 52415^2 + 33736^2 .

It is a cyclic number.

It is not a de Polignac number, because 3885449921 - 2²² = 3881255617 is a prime.

Together with 3885449923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3885449923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1942724960 + 1942724961.

It is an arithmetic number, because the mean of its divisors is an integer number (1942724961).

Almost surely, 2^3885449921 is an apocalyptic number.

It is an amenable number.

3885449921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3885449921 is an equidigital number, since it uses as much as digits as its factorization.

3885449921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 53.

The square root of 3885449921 is about 62333.3772629079. The cubic root of 3885449921 is about 1572.1009805974.

The spelling of 3885449921 in words is "three billion, eight hundred eighty-five million, four hundred forty-nine thousand, nine hundred twenty-one".