99129761 has 2 divisors, whose sum is σ = 99129762. Its totient is φ = 99129760.

The previous prime is 99129757. The next prime is 99129763. The reversal of 99129761 is 16792199.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97614400 + 1515361 = 9880^2 + 1231^2 .

It is a cyclic number.

It is not a de Polignac number, because 99129761 - 2² = 99129757 is a prime.

Together with 99129763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99129763) 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, 49564880 + 49564881.

It is an arithmetic number, because the mean of its divisors is an integer number (49564881).

Almost surely, 2^99129761 is an apocalyptic number.

It is an amenable number.

99129761 is a deficient number, since it is larger than the sum of its proper divisors (1).

99129761 is an equidigital number, since it uses as much as digits as its factorization.

99129761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 44.

The square root of 99129761 is about 9956.3929713526. The cubic root of 99129761 is about 462.8085281053.

The spelling of 99129761 in words is "ninety-nine million, one hundred twenty-nine thousand, seven hundred sixty-one".