4871720261 has 2 divisors, whose sum is σ = 4871720262. Its totient is φ = 4871720260.

The previous prime is 4871720257. The next prime is 4871720263. The reversal of 4871720261 is 1620271784.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4777436161 + 94284100 = 69119^2 + 9710^2 .

It is a cyclic number.

It is not a de Polignac number, because 4871720261 - 2² = 4871720257 is a prime.

Together with 4871720263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4871720263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2435860130 + 2435860131.

It is an arithmetic number, because the mean of its divisors is an integer number (2435860131).

Almost surely, 2^4871720261 is an apocalyptic number.

It is an amenable number.

4871720261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4871720261 is an equidigital number, since it uses as much as digits as its factorization.

4871720261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 4871720261 is about 69797.7095684378. The cubic root of 4871720261 is about 1695.2253870252.

The spelling of 4871720261 in words is "four billion, eight hundred seventy-one million, seven hundred twenty thousand, two hundred sixty-one".