999040073 has 2 divisors, whose sum is σ = 999040074. Its totient is φ = 999040072.

The previous prime is 999040043. The next prime is 999040087. The reversal of 999040073 is 370040999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 590878864 + 408161209 = 24308^2 + 20203^2 .

It is an emirp because it is prime and its reverse (370040999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999040073 - 2¹⁴ = 999023689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999040073.

It is not a weakly prime, because it can be changed into another prime (999040013) 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, 499520036 + 499520037.

It is an arithmetic number, because the mean of its divisors is an integer number (499520037).

Almost surely, 2^999040073 is an apocalyptic number.

It is an amenable number.

999040073 is a deficient number, since it is larger than the sum of its proper divisors (1).

999040073 is an equidigital number, since it uses as much as digits as its factorization.

999040073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 999040073 is about 31607.5951790072. The cubic root of 999040073 is about 999.6799218943.

The spelling of 999040073 in words is "nine hundred ninety-nine million, forty thousand, seventy-three".