2386641721 has 2 divisors, whose sum is σ = 2386641722. Its totient is φ = 2386641720.

The previous prime is 2386641707. The next prime is 2386641727. The reversal of 2386641721 is 1271466832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2151939321 + 234702400 = 46389^2 + 15320^2 .

It is a cyclic number.

It is not a de Polignac number, because 2386641721 - 2⁹ = 2386641209 is a prime.

It is not a weakly prime, because it can be changed into another prime (2386641727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1193320860 + 1193320861.

It is an arithmetic number, because the mean of its divisors is an integer number (1193320861).

Almost surely, 2^2386641721 is an apocalyptic number.

It is an amenable number.

2386641721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2386641721 is an equidigital number, since it uses as much as digits as its factorization.

2386641721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 2386641721 is about 48853.2672500008. The cubic root of 2386641721 is about 1336.3772571839.

The spelling of 2386641721 in words is "two billion, three hundred eighty-six million, six hundred forty-one thousand, seven hundred twenty-one".