8301115721 has 2 divisors, whose sum is σ = 8301115722. Its totient is φ = 8301115720.

The previous prime is 8301115709. The next prime is 8301115741. The reversal of 8301115721 is 1275111038.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7057848121 + 1243267600 = 84011^2 + 35260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8301115721 is a prime.

It is not a weakly prime, because it can be changed into another prime (8301115741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4150557860 + 4150557861.

It is an arithmetic number, because the mean of its divisors is an integer number (4150557861).

Almost surely, 2^8301115721 is an apocalyptic number.

It is an amenable number.

8301115721 is a deficient number, since it is larger than the sum of its proper divisors (1).

8301115721 is an equidigital number, since it uses as much as digits as its factorization.

8301115721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 8301115721 is about 91110.4589001724. The cubic root of 8301115721 is about 2024.7845705691.

Adding to 8301115721 its reverse (1275111038), we get a palindrome (9576226759).

The spelling of 8301115721 in words is "eight billion, three hundred one million, one hundred fifteen thousand, seven hundred twenty-one".