999636073 has 2 divisors, whose sum is σ = 999636074. Its totient is φ = 999636072.

The previous prime is 999636049. The next prime is 999636107. The reversal of 999636073 is 370636999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 684502569 + 315133504 = 26163^2 + 17752^2 .

It is an emirp because it is prime and its reverse (370636999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999636073 - 2⁹ = 999635561 is a prime.

It is a super-2 number, since 2×999636073² = 1998544556885722658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 999636073.

It is not a weakly prime, because it can be changed into another prime (999616073) 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, 499818036 + 499818037.

It is an arithmetic number, because the mean of its divisors is an integer number (499818037).

Almost surely, 2^999636073 is an apocalyptic number.

It is an amenable number.

999636073 is a deficient number, since it is larger than the sum of its proper divisors (1).

999636073 is an equidigital number, since it uses as much as digits as its factorization.

999636073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1653372, while the sum is 52.

The square root of 999636073 is about 31617.0218869520. The cubic root of 999636073 is about 999.8786762812.

The spelling of 999636073 in words is "nine hundred ninety-nine million, six hundred thirty-six thousand, seventy-three".