9999000009949 has 2 divisors, whose sum is σ = 9999000009950. Its totient is φ = 9999000009948.

The previous prime is 9999000009899. The next prime is 9999000009953. The reversal of 9999000009949 is 9499000009999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5831828946724 + 4167171063225 = 2414918^2 + 2041365^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999000009949 - 2²¹ = 9998997912797 is a prime.

It is a super-3 number, since 3×9999000009949³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999000009959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999500004974 + 4999500004975.

It is an arithmetic number, because the mean of its divisors is an integer number (4999500004975).

Almost surely, 2^{9999000009949} is an apocalyptic number.

It is an amenable number.

9999000009949 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999000009949 is an equidigital number, since it uses as much as digits as its factorization.

9999000009949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19131876, while the sum is 67.

The spelling of 9999000009949 in words is "nine trillion, nine hundred ninety-nine billion, nine thousand, nine hundred forty-nine".