9999000761 has 2 divisors, whose sum is σ = 9999000762. Its totient is φ = 9999000760.

The previous prime is 9999000709. The next prime is 9999000797. The reversal of 9999000761 is 1670009999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7059192361 + 2939808400 = 84019^2 + 54220^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999000761 - 2²⁶ = 9931891897 is a prime.

It is not a weakly prime, because it can be changed into another prime (9999000701) 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, 4999500380 + 4999500381.

It is an arithmetic number, because the mean of its divisors is an integer number (4999500381).

Almost surely, 2^9999000761 is an apocalyptic number.

It is an amenable number.

9999000761 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999000761 is an equidigital number, since it uses as much as digits as its factorization.

9999000761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 275562, while the sum is 50.

The square root of 9999000761 is about 99995.0036801839. The cubic root of 9999000761 is about 2154.3629278027.

The spelling of 9999000761 in words is "nine billion, nine hundred ninety-nine million, seven hundred sixty-one", and thus it is an aban number.