4721873857 has 2 divisors, whose sum is σ = 4721873858. Its totient is φ = 4721873856.

The previous prime is 4721873833. The next prime is 4721873887. The reversal of 4721873857 is 7583781274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4225520016 + 496353841 = 65004^2 + 22279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4721873857 is a prime.

It is not a weakly prime, because it can be changed into another prime (4721873887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2360936928 + 2360936929.

It is an arithmetic number, because the mean of its divisors is an integer number (2360936929).

Almost surely, 2^4721873857 is an apocalyptic number.

It is an amenable number.

4721873857 is a deficient number, since it is larger than the sum of its proper divisors (1).

4721873857 is an equidigital number, since it uses as much as digits as its factorization.

4721873857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2634240, while the sum is 52.

The square root of 4721873857 is about 68715.8923175709. The cubic root of 4721873857 is about 1677.6632593491.

The spelling of 4721873857 in words is "four billion, seven hundred twenty-one million, eight hundred seventy-three thousand, eight hundred fifty-seven".