5258947721 has 2 divisors, whose sum is σ = 5258947722. Its totient is φ = 5258947720.

The previous prime is 5258947657. The next prime is 5258947741. The reversal of 5258947721 is 1277498525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3503337721 + 1755610000 = 59189^2 + 41900^2 .

It is a cyclic number.

It is not a de Polignac number, because 5258947721 - 2⁶ = 5258947657 is a prime.

It is a super-2 number, since 2×5258947721² = 55313062264422187682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5258947721.

It is not a weakly prime, because it can be changed into another prime (5258947741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2629473860 + 2629473861.

It is an arithmetic number, because the mean of its divisors is an integer number (2629473861).

Almost surely, 2^5258947721 is an apocalyptic number.

It is an amenable number.

5258947721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5258947721 is an equidigital number, since it uses as much as digits as its factorization.

5258947721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1411200, while the sum is 50.

The square root of 5258947721 is about 72518.6025858193. The cubic root of 5258947721 is about 1739.0001435128. Note that the first 3 decimals are identical.

The spelling of 5258947721 in words is "five billion, two hundred fifty-eight million, nine hundred forty-seven thousand, seven hundred twenty-one".