8721232757 has 2 divisors, whose sum is σ = 8721232758. Its totient is φ = 8721232756.

The previous prime is 8721232711. The next prime is 8721232771. The reversal of 8721232757 is 7572321278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5211973636 + 3509259121 = 72194^2 + 59239^2 .

It is a cyclic number.

It is not a de Polignac number, because 8721232757 - 2¹⁸ = 8720970613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8721232787) 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, 4360616378 + 4360616379.

It is an arithmetic number, because the mean of its divisors is an integer number (4360616379).

Almost surely, 2^8721232757 is an apocalyptic number.

It is an amenable number.

8721232757 is a deficient number, since it is larger than the sum of its proper divisors (1).

8721232757 is an equidigital number, since it uses as much as digits as its factorization.

8721232757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 329280, while the sum is 44.

The square root of 8721232757 is about 93387.5406946773. The cubic root of 8721232757 is about 2058.3819226537.

The spelling of 8721232757 in words is "eight billion, seven hundred twenty-one million, two hundred thirty-two thousand, seven hundred fifty-seven".