999906575797 has 2 divisors, whose sum is σ = 999906575798. Its totient is φ = 999906575796.

The previous prime is 999906575711. The next prime is 999906575809. The reversal of 999906575797 is 797575609999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 934100987121 + 65805588676 = 966489^2 + 256526^2 .

It is a cyclic number.

It is not a de Polignac number, because 999906575797 - 2¹⁹ = 999906051509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999906575797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999906575197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499953287898 + 499953287899.

It is an arithmetic number, because the mean of its divisors is an integer number (499953287899).

Almost surely, 2^999906575797 is an apocalyptic number.

It is an amenable number.

999906575797 is a deficient number, since it is larger than the sum of its proper divisors (1).

999906575797 is an equidigital number, since it uses as much as digits as its factorization.

999906575797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3038071050, while the sum is 82.

The spelling of 999906575797 in words is "nine hundred ninety-nine billion, nine hundred six million, five hundred seventy-five thousand, seven hundred ninety-seven".