3855421903 has 2 divisors, whose sum is σ = 3855421904. Its totient is φ = 3855421902.

The previous prime is 3855421783. The next prime is 3855421957. The reversal of 3855421903 is 3091245583.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3855421903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3855421963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1927710951 + 1927710952.

It is an arithmetic number, because the mean of its divisors is an integer number (1927710952).

Almost surely, 2^3855421903 is an apocalyptic number.

3855421903 is a deficient number, since it is larger than the sum of its proper divisors (1).

3855421903 is an equidigital number, since it uses as much as digits as its factorization.

3855421903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 3855421903 is about 62092.0437978973. The cubic root of 3855421903 is about 1568.0406003854.

The spelling of 3855421903 in words is "three billion, eight hundred fifty-five million, four hundred twenty-one thousand, nine hundred three".