5891724721 has 2 divisors, whose sum is σ = 5891724722. Its totient is φ = 5891724720.

The previous prime is 5891724653. The next prime is 5891724737. The reversal of 5891724721 is 1274271985.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3304985121 + 2586739600 = 57489^2 + 50860^2 .

It is a cyclic number.

It is not a de Polignac number, because 5891724721 - 2¹³ = 5891716529 is a prime.

It is not a weakly prime, because it can be changed into another prime (5891724791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2945862360 + 2945862361.

It is an arithmetic number, because the mean of its divisors is an integer number (2945862361).

Almost surely, 2^5891724721 is an apocalyptic number.

It is an amenable number.

5891724721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5891724721 is an equidigital number, since it uses as much as digits as its factorization.

5891724721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 46.

The square root of 5891724721 is about 76757.5710988825. The cubic root of 5891724721 is about 1806.1236620870.

It can be divided in two parts, 58917 and 24721, that added together give a palindrome (83638).

The spelling of 5891724721 in words is "five billion, eight hundred ninety-one million, seven hundred twenty-four thousand, seven hundred twenty-one".