99664277 has 2 divisors, whose sum is σ = 99664278. Its totient is φ = 99664276.

The previous prime is 99664261. The next prime is 99664283. The reversal of 99664277 is 77246699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90459121 + 9205156 = 9511^2 + 3034^2 .

It is a cyclic number.

It is not a de Polignac number, because 99664277 - 2⁴ = 99664261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99664297) 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, 49832138 + 49832139.

It is an arithmetic number, because the mean of its divisors is an integer number (49832139).

Almost surely, 2^99664277 is an apocalyptic number.

It is an amenable number.

99664277 is a deficient number, since it is larger than the sum of its proper divisors (1).

99664277 is an equidigital number, since it uses as much as digits as its factorization.

99664277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 50.

The square root of 99664277 is about 9983.1997375591. The cubic root of 99664277 is about 463.6388716174.

The spelling of 99664277 in words is "ninety-nine million, six hundred sixty-four thousand, two hundred seventy-seven".