4947016621 has 2 divisors, whose sum is σ = 4947016622. Its totient is φ = 4947016620.

The previous prime is 4947016619. The next prime is 4947016637. The reversal of 4947016621 is 1266107494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4926495721 + 20520900 = 70189^2 + 4530^2 .

It is a cyclic number.

It is not a de Polignac number, because 4947016621 - 2¹ = 4947016619 is a prime.

It is a super-3 number, since 3×4947016621³ (a number of 30 digits) contains 333 as substring.

Together with 4947016619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4947016691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2473508310 + 2473508311.

It is an arithmetic number, because the mean of its divisors is an integer number (2473508311).

Almost surely, 2^4947016621 is an apocalyptic number.

It is an amenable number.

4947016621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4947016621 is an equidigital number, since it uses as much as digits as its factorization.

4947016621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 4947016621 is about 70335.0312504374. The cubic root of 4947016621 is about 1703.9144652278.

The spelling of 4947016621 in words is "four billion, nine hundred forty-seven million, sixteen thousand, six hundred twenty-one".