99966539 has 2 divisors, whose sum is σ = 99966540. Its totient is φ = 99966538.

The previous prime is 99966499. The next prime is 99966557. The reversal of 99966539 is 93566999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99966539 - 2⁸ = 99966283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99966589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49983269 + 49983270.

It is an arithmetic number, because the mean of its divisors is an integer number (49983270).

Almost surely, 2^99966539 is an apocalyptic number.

99966539 is a deficient number, since it is larger than the sum of its proper divisors (1).

99966539 is an equidigital number, since it uses as much as digits as its factorization.

99966539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3542940, while the sum is 56.

The square root of 99966539 is about 9998.3268100218. The cubic root of 99966539 is about 464.1071068512.

The spelling of 99966539 in words is "ninety-nine million, nine hundred sixty-six thousand, five hundred thirty-nine".