4873919021 has 2 divisors, whose sum is σ = 4873919022. Its totient is φ = 4873919020.

The previous prime is 4873919009. The next prime is 4873919027. The reversal of 4873919021 is 1209193784.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4630122025 + 243796996 = 68045^2 + 15614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4873919021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4873919027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2436959510 + 2436959511.

It is an arithmetic number, because the mean of its divisors is an integer number (2436959511).

Almost surely, 2^4873919021 is an apocalyptic number.

It is an amenable number.

4873919021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4873919021 is an equidigital number, since it uses as much as digits as its factorization.

4873919021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 4873919021 is about 69813.4587382691. The cubic root of 4873919021 is about 1695.4803847775.

The spelling of 4873919021 in words is "four billion, eight hundred seventy-three million, nine hundred nineteen thousand, twenty-one".