4905379021 has 2 divisors, whose sum is σ = 4905379022. Its totient is φ = 4905379020.

The previous prime is 4905378901. The next prime is 4905379051. The reversal of 4905379021 is 1209735094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4688140900 + 217238121 = 68470^2 + 14739^2 .

It is a cyclic number.

It is not a de Polignac number, because 4905379021 - 2⁷ = 4905378893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4905379051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2452689510 + 2452689511.

It is an arithmetic number, because the mean of its divisors is an integer number (2452689511).

Almost surely, 2^4905379021 is an apocalyptic number.

It is an amenable number.

4905379021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4905379021 is an equidigital number, since it uses as much as digits as its factorization.

4905379021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 4905379021 is about 70038.4110399429. The cubic root of 4905379021 is about 1699.1205394557.

The spelling of 4905379021 in words is "four billion, nine hundred five million, three hundred seventy-nine thousand, twenty-one".